"There are three doors, let's say there is a gold behind one of the three doors, and there is nothing behind the other two doors.

After you have chosen a door, sir, I am helping you to eliminate one of the doors that does not have gold, at this time, the remaining two doors, is there the same probability of gold in it? ”

Lu Chensheng stood at the table and asked the students below.

Occasionally, Lu Chensheng will still take a little time to teach some knowledge to the students.

"Sir, this is naturally the same, since there is no gold in one door, then the rest is naturally fifty percent."

"Yes, sir, isn't that a simple matter of probability?"

The students sat down a little puzzled, and looked up at their husbands in confusion.

Hearing this, Lu Chensheng looked at the students below and shook his head.

"No, you see, when you first began to choose, the three doors were still there, and you had a one-third chance of choosing the door of gold, and a two-thirds chance of choosing the empty door.

Before you eliminated an empty door, the probability of you choosing an empty door was as high as two-thirds, and now that you have eliminated an empty door, wouldn't the probability of the remaining door having gold increase a lot? ”

Lu Chensheng explained this counterintuitive probability problem with the students.

The students seemed a little confused when they heard this.

The most important thing is that Du Rufang on the side didn't understand.

Seeing this, Lu Chensheng shook his head and continued to explain in a different way.

"So let's explain it in another way, there are actually only a few possibilities in this, in short, your choice is that Gate 1 remains unchanged, and you are sure that there is gold behind Gate 1.

But actually, you also know that there may not be gold behind the door.

The first possibility is that there is gold behind Gate One, then you get the gold.

The second possibility is that Gate 1 has no gold and is behind Gate 2 or Gate 3, and at this time I will eliminate one of the empty doors and leave the next door with gold.

If the gold is behind Gate 2, I'll help remove Gate 3, and then you can get Gate 2 with gold.

If the gold is behind Gate 3, I will help remove Gate 2, and you can also get Gate 3 with gold if you change it.

So there are three possibilities, one is that the gold is in Gate No. 1, and you have a one-third chance of choosing the right one, but if you change it at this time, then the probability of choosing the right one will reach two-thirds. ”

Lu Chensheng's explanation this time suddenly made the students suddenly realize, and then wrote and drew on the paper, and then looked surprised.

Originally, in their opinion, there is no difference between this exchange and not exchange, and the probability is 50%.

But now, listening to Mr.'s explanation, they found that the probability is completely different at this time.

It was Du Rufang on the side, his face was full of surprise.

After he came here, he would also come here from time to time to listen to some lectures, and if Lu Chensheng came to give a lecture, he would come on time.

He knew the gap between himself and Lu Chensheng, but after listening to some classes after that, he knew that the gap was not a little bit.

After the students digested some of the content, Lu Chensheng took out the rest of the math problems and talked to the students again.

waited until the time was almost over, and then Lu Chensheng announced the end of school.

Du Rufang got up and walked out of the classroom with Lu Chensheng.

"Alas, although you have been winning against me before, I feel that the gap is just a little bit, and now that I am looking, I know that the gap between us has reached such a point."

Du Rufang was a little helpless.

Originally, he thought that the gap between them was not that big, but now he found out that the gap between them was actually getting bigger and bigger, which made him feel a little hit.

"It's just some math problems, and there's no need for that."

Lu Chensheng waved his hand and walked outside with Du Rufang.

"Now that the Great Cangguo has been taken, what are Brother Lu's plans?"

It has been more than ten days since the Great Cangguo was completely taken down, and after Du Rufang knew the news, he quickly sent people back to ask his family members not to clash with the soldiers of Xinghan City.

At this time, he also found Lu Chensheng and wanted to discuss something.

"What can I plan, I will naturally work hard."

Lu Chensheng replied, making Du Rufang smile bitterly.

"Brother Lu, in the next family, Brother Lu also understands that Jiang Guo is already in the hands of Brother Lu, and those big families have been cleaned up by Brother Lu, and now that he has arrived in Dacang Kingdom, I hope that Brother Lu can raise his noble hand."

Du Rufang was worried, and Lu Chensheng made a move on the Du family.

To say that they are such a big family, if Lu Chensheng is serious, it is naturally possible to find out some faults.

Lu Chensheng turned his head to look at Du Rufang, "Didn't you already say this before?" ”

As mentioned before, Lu Chensheng would not do anything to their family.

Du Rufang naturally remembered that this time he came over mainly because he was worried that Lu Chensheng would change his hexagram.

A person's power is getting bigger and bigger, and his heart will change with it, and this is naturally what he is worried about.

Lu Chensheng thought for a while and continued, "This matter has been said before, but there is one thing you still need to abide by, the good land must be paid, there are too many good fields controlled by the family, this is not something I can tolerate." ”

This is Lu Chensheng's bottom line, and he can't back down.

Du Rufang breathed a sigh of relief when he heard this, just this matter, it was actually nothing.

It's just a good field, just grit your teeth and take it out, although there are many old stubborns in the family, and they may be quarreled over this.

But his words are still somewhat useful, and it is important to get them to agree.

"Of course, I won't let you suffer, let them come to Xinghan City when the time comes, some businesses can be cooperated."

The output of Xinghan City is too low, and Lu Chensheng wants to revitalize the economy, so there will be taxes.

According to Lu Chensheng's current policy, the people of this large tax collector are exempted, so there is basically no source of tax revenue.

That's not a good thing for a dynasty.

Soldiers, horses, food, grass, military salaries, and scientific research and progress all require a large sum of silver.

Just with the income of Star Seoul, it can't support such consumption.

Du Rufang was overjoyed when he heard this, and hurriedly nodded at this moment, "Yes, then I'll notify them immediately." ”

Lu Chensheng did not change his previous mind, which made Du Rufang breathe several sighs of relief in his heart, he was afraid that Lu Chensheng would regret it, and Xinghan City could take the opportunity to make a lot of money if he had no money.

After all, he still knew the situation on Jiang Guo's side, but now that he saw it, he thought too much.