"Each person draws one of the four cards of 5, 10, 20, and 50 at a time, and the probability of each card getting each card will be a quarter of a quarter, right?" Ruyu took out the posture of the teacher.

Jian Xuran and Geng Letian couldn't help but nodded, they still know such a little bit of mathematical knowledge!

"The game requirement is that as long as the cards in your hand are added and you get 100, you can get an invitation.

No one in the first round will get a hundred, but in the second round there will be a chance. ”

Geng Letian's eyes lit up: "Yes, if the luck in the first round is very explosive, it will be drawn to 50."

The luck in the second round is also very explosive, and if you still draw 50, then add up to 100 and you can get an invitation! ”

Jian Xuran is not optimistic about this: "Everyone knows the truth, but how many people can really be 50 in the first round and 50 in the second round?" ”

Ouyang Ruyu didn't want to think about it and said, "One-sixteenth." ”

"Huh?"

"The probability of being able to draw 50 in the first round is 1/4, and the probability of being able to draw 50 in the second round is 1/16 in combination with the previous 1st round.

In other words, out of 100 people, on average, one person will draw 100 to become the lucky winner every 16 people, which is not a low probability. ”

"But it's still hard to achieve, what if you don't draw fifty in the first round and fifty in the second round?" Jian Xuran asked again.

"I can only pray to others to change cards, otherwise I will never make up a hundred." Ruyu said lightly.

"Wait, don't we have a third round, there's still a chance for the third round!" Geng Lotian hurriedly said.

Ruyu shook her head, "No, there's no chance." ”

Her brain becomes a piece of data at this moment, doing accurate data analysis.

"If you don't draw 50 in the first two rounds, just draw two of the three cards of 5, 10 and 20 and add them together, and the highest card will not exceed 40.

So even if you draw 50 in the third round, you don't have a chance to make 100. ”

Geng Letian and Jian Xuran were stunned for a moment, and they couldn't turn around.

Ruyu said finally: "So the winner of this game can be determined by drawing in the first two rounds, and those who do not draw 50 in the first two rounds will be eliminated!" ”

Geng Letian and Jian Xuran's faces changed drastically, and the cruel rules were slowly revealing their fangs!

"So what if one of the first two rounds draws 50, what is the probability that the final face will be 100?" Geng Letian asked hurriedly.

"A quarter." Ruyu calmly walked to the end of the line and lined up.

"The first key point in this game is 50, and the second key point is when you draw 50.

If you draw in the first two rounds, there is hope in the third round, and if you don't draw in the first two rounds, you are destined to be eliminated. ”

Jian Xuran and Geng Letian hurriedly followed behind her.

If nothing else, just because this person looks smart!

If you follow the big guy, you shouldn't go wrong.

Jian Xuran said with some confusion: "But it is still a minority to really draw 100."

Even if one of the first two rounds is drawn to 50, and the third round is hopeful, the sum of the three draws will never be exactly equal to 100, and there must be more numbers. ”

Geng Letian didn't know what to think, suddenly realized, and hurriedly said: "So that clown can let us change the cards, we can replace the extra cards with others!" ”

Ouyang Ruyu looked at Geng Letian approvingly, "It's not easy, you're finally smart!" ”

Geng Letian: "......"

Although it is a compliment, why does it always feel aggrieved?

Jian Xuran didn't expect so much, breathed a sigh of relief, and muttered: "Yes, you can also change the cards, anyway, as long as the first two rounds are drawn to 50, everything is hopeful."

You have to draw 50, you have to draw 50......"

The two of them put their hands together and prayed to God to worship the Buddha, and Jesus God came to the Buddha, Guanyin, Bodhisattva, and Monkey King.

"Ahh Two 50s, haha, I drew two 50s, I got an invitation, hahaha, I got an invitation! ”

In the hall, one of the taskers suddenly screamed and happily jumped around in place.

The cards in his hand were glittering, and they were joining together in front of everyone.

"Bang!" One

A salute flower suddenly appeared from above the card, and silver sequins burst out from it and sprinkled on the head and shoulders of the tasker.

The sound of courtesy music sounded, and the two 50s automatically merged into a new 100, and the three big words "Invitation" were written on the back of the card.

This was like a signal, and the next lucky ones showed up in piles, and both of them drew two 50 invitations in both rounds, which merged into 100.

The person with the invitation is relaxed, sitting on the other side of the casino, watching the other quests go crazy trying to get the invitation.

The team is getting smaller and smaller, and soon it will be Ouyang Ruyu's turn.

Jian Xuran and Geng Letian were very nervous, and there was another round of Eastern and Western immortal battles in their mouths.

Suddenly, Geng Letian grabbed Ouyang Ruyu and asked nervously, "Wait, do you have any way to ensure 100% customs clearance?" ”

Ouyang Ruyu gave him a blank look, "I can't affect the control of cards, it's a matter of pure probability luck."

If I could control my luck, I wouldn't have joined any of the worlds museums. ”

Not to mention that he was put on the body for a year, not to mention the memory of losing a year at the end of the day, and even the fifty-year lifespan was taken up.

Alas, the more I think about it, the more I feel unlucky, life is not easy, the cat sighs!

Jian Xuran snorted, "Forget it, don't complain, although there are many dangers in the Museum of All Worlds, opportunities and dangers coexist."

As long as you complete the task, you will be able to obtain the universal point exchange exercise, and go to the sky and the earth like the legendary immortals, who doesn't want to be so majestic?

Besides, you can live a long life! ”

Ouyang Ruyu complained: "If this world can't survive, we don't know whether we are dead or alive, or don't think about things for so long." ”

Geng Letian couldn't help but ask, "Why don't you look nervous at all?" ”

Ouyang Ruyu was already standing in front of the grid at this time, reaching out to draw the card.

"If nervousness can be exchanged for my luck, I can be several times more nervous than you."

First card draw - 20.

Without changing her face, she drew another one.

The second card is drawn - 5.

Ruyu's expression changed slightly, and she drew a card again.

The third card is drawn - 50.

The cards drawn in three rounds are 75 points, and if you make up a hundred, you have to add a 5 and 20, but that's almost impossible!

Not to mention whether you can swap them out, there's a good chance that no one will have these two cards at all!

"How's it going, have you drawn 50, have you cleared the customs?" Geng Lotian and Jian Xuran both craned their necks to look.

Ouyang Ruyu flipped the cards underneath and didn't show them the numbers, "There is no clearance." ”