The host was waiting for Mo Yuan's reply, as if expecting him to accept it when he saw it.

The crowd of onlookers waited for Mo Yuan's reply, as if expecting him to win to the end.

"Of course, we have to continue, compared to this lifelong VIP customer status, the previous prizes are nothing at all. Mo Yuan replied.

The host was a little disappointed, this young man was willing to risk losing all the prizes he had won before for a prize that he might not be able to get, "In the previous round of the competition, this customer took the initiative to announce his choice to the other two opponents in advance, and he knew that he was courageous, and now, he is even more victorious in pursuit, and his courage is indeed commendable!" With the host's words, the customers who were eliminated in the second round walked off the high platform in turn, leaving only the host and Mo Yuan.

Wu Xin walked halfway and glanced back, under the dazzling light, Mo Yuan's back was not as usually described in those novels, either upright, or majestic, or exuding an aura of determination and victory, those were just unrealistic exaggerations, she only felt that Mo Yuan's back had a feeling of being alone, lonely and tired.

The crowd of onlookers became excited again, looking forward to the arrival of a good show, after all, no matter whether Mo Yuan won or lost, there would be no loss for the onlookers, but they watched a wonderful performance.

"Okay", the host asked Mo Yuan, "I haven't asked you for your name yet." ”

"Mo Yuan. ”

"Well, hopefully you can go further in this race and finally reach the end of the victory. The host blessed.

"Thank you. ”

"Now, let me introduce the rules of this final round. As soon as the host finished speaking, the floor in front of him gradually retracted to the sides, and a table slowly rose from under the floor, there seemed to be something on the table, like a small box, and the staff brought two chairs and placed them on both sides of the table.

"You may be seated. The host said politely.

"Good. ”

The two sat separately, facing each other, with the host sitting on the left and Mo Yuan sitting on the right, and the customers watching from the audience could see the side faces of the two.

"This box contains a deck of playing cards," said the host, picking up the small box on the table and drawing one of the cards out of it, "Ordinary playing cards are like this one in my hand, with points printed on one side and patterns printed on the other." The host showed the playing cards in his hand, with the ace of spades on one side and a picture of Satan on the other.

"I have a misprinted card here," said the host, drawing another card from the box, "and it has points printed on both sides." The host showed the poker card again, with the ace of spades on one side and the ace of spades on the other.

"You can check these two playing cards", said the host, handing the two playing cards to Mo Yuan, "You can find that the ace of spades of these two playing cards is exactly the same." ”

Mo Yuan took the two playing cards and didn't look at them carefully, but just looked at them a few times out of politeness, and cooperated with the host to complete this necessary process.

"We didn't do anything behind the scenes. The host said.

"Well, I'm very sure of this, businessmen are naturally very honest, and to be able to run such a large-scale mall, they must disdain to secretly make some small moves in this kind of activity to give back to customers. Mo Yuan said.

"Naturally, honesty is the foundation, and children are not deceived, which has been the norm for doing business since ancient times. The host said, taking out a black opaque flannel bag from his coat pocket, "Please put these two cards in this flannel bag." ”

Mo Yuan put the two cards into the flannel bag according to the host's request.

After the two cards were put into the flannel bag, the host shook the bag a few times, and then, put the flannel bag close to the table to Mo Yuan, and said: "Please take a card out of the bag and put it on the table, it should be noted that when you take it out, please be careful to make sure that the cards are horizontal, one side up, one side down, do not let us see the cards face down." ”

According to the host's request, Mo Yuan carefully took out a card from the flannel bag and put it on the table, with the upward side being "Ace of Spades".

"I noticed that in the previous round, Mr. Mo chose 'not to believe' the question 'Do you believe that there is real and lasting love in this world?', does this indicate that Mr. Mo has a skeptical and negative attitude towards human nature?" the host asked Mo Yuan.

"Indeed, with a negative attitude. Mo Yuan replied.

"Well, since you're inclined to be negative about human nature, if it's 'Satan,' you won, and if it's the 'Ace of Spades,' it means I've won," the host asked.

"It makes sense. Mo Yuan seemed to be thinking about something, but he readily agreed at the moment.

"Okay, turn the other side of the card upside down. The host said to Mo Yuan.

According to the host's request, Mo Yuan turned the other side of the card over, which was "Satan".

"Well, this demo ended with your victory", said the host, "no wonder you made it to the third round, you were lucky." ”

"Haha, that's it. Mo Yuanyi smiled.

"We call the process we just demonstrated a round. Considering that only one round is too random to decide the winner, this round is considered to be the winner of the whole match if he wins nine rounds first. The host slowly explained, "In each round, you put the cards into this opaque black velvet bag, and then I shake the bag, and then you take out a card horizontally and place it on the table, if the downward side is 'Satan', you win the round, if the downward side is the 'Ace of Spades', then I win the round." ”

"Well, what if the card taken out of the bag has 'Satan' on the upward side?" asked Mo Yuan.

"If that's the case, it's obvious that the downward-facing side must be the 'Ace of Spades', and for this kind of situation where there is no suspense and I am sure to win, we will skip it and not count it as a sign of justice. The moderator replied.

"Good. Mo Yuan said, "I have understood the rules. ”

"Hurry up and get started!" shouted one of the onlookers in the audience, as long as the first person opened his mouth, "yes, let's get started, don't whet our appetite." "That's it, that's it, you really don't have a backache when you sit and talk, but we're all standing." "There will be a lot of people shouting along with you, and the crowd is such an interesting group.

Wu Xin looked at Mo Yuan, as if his face was embarrassed, "Mr. Wu, what's wrong with you?" Zhang Yi asked with concern.

"It's nothing, I'm hungry. ”

"Okay, let's start the official competition. The host said.

"Good. Mo Yuan said, putting the two cards into the opaque black flannel bag. The host shook the bag, and then pointed the mouth of the bag towards Mo Yuan, who took out a card from the bag horizontally and placed it on the table, with the upward side being the "Ace of Spades".

"Let's see who wins this first round?" the host professionally rendered the suspense.

Mo Yuan turned the other side of the card over, "Satan"!

"Mr. Mo will go down to the city first!" said the host, "and tonight's luck seems to be concentrated on Mr. Mo." ”

On the screen behind the host, the score between Mo Yuan and the host is displayed: "1:0".

"I knew he could win, this guy was lucky, otherwise, how could he win two games in a row?" said the customer in the audience who was eliminated in the second game.

"Then let's move on to the second round. The host said.

"Good. Mo Yuan said, placing the two cards into the opaque black flannel bag again. The host shook the bag, and then turned the mouth of the bag towards Mo Yuan, who took out a card from the bag horizontally and placed it on the table, this time, the upward side was "Satan".

"As per the rules, we just skip the situation. The host said, "Let's move on to the next round." ”

"Good. Mo Yuan said, putting the two cards into the flannel bag again.

The cards were placed on the table again, the "Ace of Spades" was facing up, Mo Yuan turned the other side, and it was "Satan" again.

"You're in luck, too. The host exclaimed.

End of the third round.

On the screen, the score between Mo Yuan and the host became: "2:0".

"He's not going to just keep winning, is he?" asked a customer in the audience. "Probably not, the other side of the card is either 'Ace of spades' or 'Satan', in terms of probability, each accounts for 50 percent, if only one round, there is indeed a lot of luck, but if at least nine rounds, it should not be one-sided, and in the end, it should be a very close score. A customer next to him analyzed.

End of the fourth round.

On the screen, the score between Mo Yuan and the host became: "2:1".

"Looks like my luck has come back, after all, it's a game of equal probabilities. The host said.

"Hmm. ”

End of the fifth round.

On the screen, the score between Mo Yuan and the host became: "2:2".

"I finally caught up. The host said.

"Hmm. ”

In the sixth round, because the upward side is "Satan", the score is not counted.

End of the seventh round.

On the screen, the score between Mo Yuan and the host became: "2:3".

"Unexpectedly, I was overtaken. The host said proudly.

"Heh, it's time for me to win the next round. ”

End of the eighth round.

On the screen, the score between Mo Yuan and the host became: "2:4".

End of the ninth round.

On the screen, the score between Mo Yuan and the host became: "3:4".

In the tenth round, because the upward side is "Satan", the score is not counted.

End of the eleventh round.

On the screen, the score between Mo Yuan and the host became: "3:5".

End of the twelfth round.

On the screen, the score between Mo Yuan and the host became: "3:6".

"Didn't you say there should be equal opportunities, why did he start falling behind? The customer in the audience asked the person who had just analyzed for him, "If you continue, you should catch up, just like the host who fell behind for a while but slowly caught up." A customer next to him said, "After all, it's an event with the same probability, as long as there are enough rounds, it will always be close." ”

But the score didn't change as the customer expected.

End of the thirteenth round.

On the screen, the score between Mo Yuan and the host became: "3:7".

"What's going on? Isn't it supposed to be close to each other?" asked Zhang Yi.

"Well, there shouldn't be such a big gap. Zhang Yi was also a little dazed.

"No, the gap should have been so big. Wu Xin said affirmatively.

"Why? The other side is either the 'Ace of Spades' or the 'Satan', which should be 50 percent each. Sun Yi was puzzled.

"This is indeed a bit confusing," Wu Xin explained slowly, "Do you remember if the upward side is 'Satan' and skip it and not record the victory?"

"Well, remember, because if the upper side is 'Satan', the other side must be the 'Ace of Spades', and the host will win without any suspense, so I think it's fair to skip this situation directly and not count it into the winner's loss. Sun Yi said.

It was this seemingly fair rule that laid the groundwork for Mo Yuan's failure. Wu Xin said with some regret.

"Why?"

"On the surface, when a card is 'Ace of Spades' on the side facing up, the other side, either 'Satan' or 'Ace of Spades', is an event with equal probability," Wu Xin looked at Mo Yuan on the stage, trying to see something from his side face, but the lights were dizzy, and he couldn't see his expression clearly, so he could only give up and continue, "But in fact, it's not. For a card that is incorrectly printed with an 'Ace of spades' on both sides, we call the 'Ace of Spades' on one side 'Ace of Spades' and the 'Ace of Spades' on the other side as 'Ace of Spades' for the card that is 'Ace of Spades' on the other side, and for the card that is 'Ace of Spades' on the other side, we call that 'Ace of Spades' 'Ace of Spades' 'Ace of Spades' 'Ace of Spades' as 'Ace of Spades' for the 'Ace of Spades' on the other side. ”

"Mr. Wu Xiao, I understand", Zhang Yi realized, "When Mo Yuan took out a card, it was ruled out because the upward side was 'Satan', so there were only three situations left where the 'Ace of spades' was facing up, namely: 'A of Spades', 'A of Spades B' or 'A of Spades C', and among them, only the other side of 'A of Spades' was ' Satan', that is to say, the probability of Mo Yuan winning is one in three, and the probability of that host winning is two thirds, which is twice as high as Mo Yuan, if only one round, Mo Yuan may be able to win, and in the case of at least nine rounds, the probability of Mo Yuan winning is much smaller than that of the host. ”

"Yes, so to speak, the host won. Wu Xin said calmly.

"I still don't quite understand, the downward side is obviously either 'Ace of spades' or 'Satan', why isn't it equal opportunities?" Sun Yi still didn't understand, "However, even if you say it, Mo Yuan's probability of winning is much smaller than that of the host, didn't Mo Yuan see it?"

"Perhaps, he was a little tired, coupled with the warm and impetuous atmosphere of the scene," Zhang Yi analyzed, "and he finally accidentally ignored this problem." Well, you can't blame him. ”

"Maybe he has already discovered the problem", although Wu Xin and Mo Yuan have only been together for a few days, Mo Yuan's careful thinking still left a deep impression on her, or maybe for some other reason, Wu Xin still believes that Mo Yuan will not be able to find the trap of this game.

"Then why did he continue to compete?" Sun Yi asked.

"Heh, what if he points out the unfairness of this game?" Wu Xin asked Sun Yi rhetorically.

"The organizers should apologize, even if they know that they did it on purpose, they will pretend to be completely unaware and deal with it as negligent work," Sun Yi said, "and then they should change to another competition." ”

"Do you think that project will be completely fair?" Wu Xin asked.

"I guess there will be a trap. Sun Yi said.

"Well, since fairness is destined not to exist, then why bother asking for it, it is better to simply have a happy game in this adversity. Wu Xin sighed, "Perhaps, that's what he thinks." ”

"However, is it really meaningful to lose the game?" Sun Yi said, and couldn't help but turn his head to look at Mo Yuan's location, under the dazzling lights, Mo Yuan's expression was blurred, and no one understood his state of mind.

The fourteenth round is not counted because the upward side is "Satan".

End of the fifteenth round.

On the screen, the score between Mo Yuan and the host became: "4:7".

Mo Yuan finally caught up with a point.

"Will there be a miracle?" Wu Xin thought, "what kind of luck does it take to do it?" ”

End of Round 16.

On the screen, the score between Mo Yuan and the host became: "5:7".

Mo Yuan caught up with another point.

"Will there really be a miracle?"

End of Round 17.

On the screen, the score between Mo Yuan and the host became: "5:8".

Mo is only one step away from losing.

"After all, people can't beat probability. ”

The onlookers began to make a noise. "If it were me, I would have accepted it a long time ago. "Yes, if you can win the second round, you should be content. "Those customers who won the first round and did not choose to continue to the second round were particularly proud, while those who were eliminated in the second round, especially the two who were eliminated in the final tiebreaker, were silently cheering for Mo Yuan.

"It seems that tonight, you overdrew too much luck ahead of schedule. The host said, "You should have taken it when you saw it before." There was no mockery, only the regret of a passer-by.

"In a game of equal probabilities, I think I still have a chance. Mo Yuan said calmly.

End of the eighteenth round.

On the screen, the score between Mo Yuan and the host became: "6:8".

Mo Yuan is still only one step away from losing the game.

"A little bit of a breather. The host smiled and said, "However, in the next round, it will be my time to win." ”

Mo Yuan was silent.

In the nineteenth round, because the upward side is "Satan", the score is not counted.

End of the twentieth round.

On the screen, the score between Mo Yuan and the host became: "7:8".

The host looked surprised and couldn't help but say to himself: "According to the probability......"

"In terms of probability, it is time for me to win a few rounds, after all, it is a game with a 50% probability of each. Mo Yuan took the host's words.

"Yes, too. Let's move on to the next round. ”

End of Round 21.

On the screen, the score between Mo Yuan and the host became: "8:8"

"Your luck is really quite incredible!" The host couldn't help but admire, "This is a situation that shouldn't have happened...... halfway through the words, the host suddenly realized that he was talking too much.

"Isn't 8:8 normal in terms of probability, and why do you think this shouldn't happen?" asked Mo Yuan.

"Haha, it's really a normal situation, let's start this decisive round quickly!" The host no longer cares about inciting the atmosphere of the scene, just cares about moving on to the next round, he knows that his winning rate should be much higher than Mo Yuan, and now in this situation, it can only be said that Mo Yuan's luck is indeed very good, but at this point, since Mo Yuan has won three rounds in a row, then the next round, no matter what, he should also win, this young man is destined to lose all the prizes he will get before.

"It's like you said, it's a game with equal probabilities and the score will be close. You're amazing!" The customer in the audience praised another customer who had analyzed the probability for him earlier, "Haha, I'm very good at math in school." Another customer smirked.

"He's so lucky, can he win? In this decisive round, it is time for the host to win. "The customers who chose to give up on continuing to participate in the second round were indignant.

"If he can win this, we have lost before, and we have nothing to say. Said the customer who lost the tiebreaker in the previous round. "yes. The other chimed in.

"Mr. Wu, what's going on?" Sun Yi asked Wu Xin.

"I don't know", Wu Xin was also at a loss, "I can't be wrong in my calculation of probability, and now this situation is really rare." ”

"Will he win?"

"Perhaps. Wu Xin still thinks that winning is impossible, but still looks forward to it.

Everyone is looking forward to the final round.

Mo Yuan slowly put the two cards into the opaque black flannel bag, the host shook the bag, and then pointed the mouth of the bag towards Mo Yuan, Mo Yuan took out a card from the bag horizontally and put it on the table, and the upward side was the "Ace of Spades", which gave people an illusion, and everything seemed to be back to the first round.

Mo Yuan slowly turned over the cards on the table.

In everyone's expectant eyes, on the screen, the score between Mo Yuan and the host became: "9:8"!

"Satan" lay quietly on the table, smiling evilly, despising the foolishness of the world.

"Mr. Mo, I can't describe your luck. "The host ran out of words for the first time.

"No, it's not because of luck. ”

"What's that?" the moderator asked.

"Because I have already made a contract with 'Satan'!" With that, Mo Yuan walked off the high platform and walked towards Wu Xin and them. Leaving the host alone to stand on the stage in a daze.

"Mr. Wu, it was really dangerous just now, I almost lost your crystal earrings and a one-year VIP customer status. Mo Yuan said to Wu Xin, who was at a loss, "Fortunately, I'm lucky, haha." ”

Wu Xin relieved himself, "Little assistant, you don't think that I really believe that it was because of your luck that I won." ”

"It's really because of good luck", Mo Yuan said, "You also saw the whole game, besides luck, what else can it be?"

"Yes, yes, Mo Yuan, you're really lucky tonight. Sun Yi exclaimed.

"Well, sure enough, no matter how small the probability is, as long as it is not zero, there is hope. Zhang Yi concluded.

"It seems that the internship period will be extended," Wu Xin said casually......

"No, leader, listen to me", Mo Yuan leaned closer to Wu Xin, whispered in her ear, "I made a small mark with my fingernail on the side of the 'Satan' card. ”

"When?"

"'5:8' later, when I put the card in the opaque flannel bag. ”

"Aren't you afraid of being discovered?"

"Because it's sideways, it's tiny, and the lights on the stage are very dazzling, it's hard to spot just by looking at it, but human touch is much more sensitive than vision, so when I take a card in the bag, I can perceive it clearly. ”

"But that's it. Wu Xin looked disdainful, "It turns out that it's such a pediatric, it's very simple." ”

"What are you talking about? I don't understand. Sun Yi asked with a blank expression.

"Still, it feels adventurous. Wu Xin thought about it and said.

"In this unfair adversity, how can we turn defeat into victory without borrowing some luck from 'Satan'?"

"Be careful, when he asks you back, it may be more than that. ”

"How do you borrow luck? Teach me, I'm going to buy lottery tickets." Zhang Yi teased.

"Hahaha" everyone laughed.

Stage.

The host suddenly thought of something, and immediately picked up the card on the table and observed it carefully.

"Sure enough!" he suddenly noticed something.

At this moment, a new instruction came from the communicator in his ear: "Ask the winning customer to go to the reception room on the top floor, the boss wants to see him." ”

"Yes!"