The middle-aged teacher didn't expect Chen Jiayao to be so crisp this time, and he was a little surprised in his heart. Pen % fun % Pavilion www.biquge.info

In the past, every time I asked her to go up and solve the problem, if she happened to be unable to solve the problem, she would say it directly, what happened today?

"She wouldn't happen to know this question, would she?" In the heart of the middle-aged teacher, such an idea suddenly popped up.

But the next moment, he denied this possibility in his heart.

This problem is a difficult problem even in permutations and combinations, and even the best students in mathematics in the class can't, let alone Chen Jiayao, a student who has no foundation in permutations and combinations.

So he clasped his hands and watched coldly at Chen Jiayao's next ugly appearance.

It was one of the few pleasures he had in class.

"Alas, Chen Jiayao won't be able to get off the stage again this time......"

There are classmates sighing quietly.

"This guy with a small belly is really hateful."

"Yaoyao just experienced that incident a few days ago, and now she is embarrassed by this guy again......"

Several female classmates who had a good relationship with Chen Jiayao cursed the middle-aged teacher fiercely in their hearts.

"Damn, I've seen this guy unpleasant for a long time, and he makes things difficult for my goddess in every class." A boy looked at the middle-aged teacher with a fierce look in his eyes, lowered his head and whispered to his tablemate: "Do you want to wait on his way home after the evening self-study, and give him some color." Don't you have a cousin out there, can you call him over and clean up this guy hard. ”

Chen Jiayao is beautiful, cheerful, and very kind to her classmates, but there is a large group of flower messengers in the class.

The middle-aged teacher didn't know that a certain boy who had a crush on Chen Jiayao was already planning how to clean him up.

Students in the third year of high school are not very mature mentally, and it is easy to do something out of the ordinary when they are impulsive.

Of course, there are also many students who are waiting to see Chen Jiayao's good play, and after they escaped, they waited for Chen Jiayao to make a fool of themselves with the attitude of watching the play.

Brush, brush, brush!

As if she didn't see other people's expressions, Chen Jiayao walked up to the podium, took out a piece of chalk and turned around to write on the blackboard.

"I'll see what you can write." The middle-aged teacher said a word in his heart, and then looked at Chen Jiayao sarcastically, waiting to see her good show.

The students below also stared at the blackboard without blinking, but after seeing what Chen Jiayao wrote on the blackboard, they were stunned at first, and then the expressions on their faces were a little exciting.

Some people can't help but want to laugh out loud.

"Based on absolute probability, the probability of getting the white ball for the twentieth time is 40/100, which is 2/5."

“”

"She's really given up on ......"

"What absolute probability, I haven't even heard of it, where did she make up this word?"

"Cut, I knew she would scribble, and it was 40/100, and fools know that the answer to this question is definitely not this."

……

……

There were a few girls who didn't have a good relationship with Chen Jiayao whispering below, and the tone was full of mockery.

"What do you know, do you know this question? If you don't, don't talk about others! ”

Of course, Chen Jiayao's girlfriends quickly fought back.

The classroom was suddenly in chaos, so no one noticed that the faint smile on the middle-aged teacher's face had disappeared, and the whole person was stunned.

Absolute probability?

Who told me what absolute probability is?

It sounds familiar, but I don't understand it at all......

But even though I don't understand, it seems to be quite lofty to hear the name.

The middle-aged teacher who used to always criticize Chen Jiayao for not studying well did not speak for a long time this time.

He didn't dare to say that the "absolute probability" written by Chen Jiayao was wrong, because the answer to this question was 40/100!

The permutations and combinations of high school are actually a small part of the "probability theory" of college courses, and the middle-aged teachers have long forgotten what they learned in college, and some theorems and special problem-solving ideas have of course been forgotten completely, but what he can be sure of is that if they use the knowledge of the university to solve them, the problems they encounter in high school are pediatrics at all!

There is no need for tedious calculations or a lot of derivation, as long as you find the right idea, some seemingly difficult questions can actually be answered in just one sentence.

It's like what is written on the blackboard.

As a teacher, he knows very well that the most important thing is to solve the problem.

"Ahem, classmate Chen Jiayao, explain the answer you wrote." In the end, the middle-aged teacher coughed dryly, turned to Chen Jiayao, who had already sat back in his seat, and asked.

Hearing the middle-aged teacher's words, there was a moment of silence in the classroom.

"No, it won't! Is the answer really 40/100? ”

"How is this possible!"

"No way, if that's the case, there's no difference between a take-back and a no-return pick-up?"

“”

For a while, the classroom became a mess again.

The middle-aged teacher's brows furrowed, and he said, "Everyone be quiet and listen to Chen Jiayao."

In that ......, let's talk about what absolute probability is. ”

The teacher had already spoken, and although some people didn't believe Chen Jiayao's answer, they immediately closed their mouths.

The middle-aged teacher didn't believe that he could explain this question clearly at Chen Jiayao's level, because even if it was him, it was not easy to explain this question clearly.

Isn't that the answer she found online?

If that's the case, then today is a criticism - no, a good opportunity to educate her.

"For this question, generally speaking, the absolute probability is that the probability of drawing the white ball has nothing to do with the number of draws, that is, whether it is put back or not, and no matter how many times it is drawn, the probability of winning the white ball is unchanged." Chen Jiayao said slowly: "In addition to absolute probability, this question can also be simplified to the lottery model and lottery model in our daily life, and the same conclusion can be drawn. ”

Chen Jiayao opened her mouth word by word, and her thoughts were extremely clear.

Because when Li Mingxuan explained this question, he used these methods to answer her one by one.

The classroom was quiet again.

Everyone, including several girlfriends, looked at Chen Jiayao with a surprised look and couldn't believe the scene in front of them.

Although they heard it in a fog, they could understand the surprised expression on the middle-aged teacher's face that she was right.

In the past, when Chen Jiayao answered wrongly, he didn't sneer and criticize each time, but this time he rarely didn't say a word.

However, when did Chen Jiayao's mathematics become so good?

In fact, Chen Jiayao's math is very good, but the math teacher always uses some permutations and combinations of difficult problems to make her difficult in class, and over time, the classmates in the class naturally think that she is not good at math.

Gradually, their gaze towards Chen Jiayao also changed.

Not because she answered a difficult question correctly, and certainly not because she was beautiful, but because the girl standing there at the moment regained the confidence and unquestionability that belonged to her.

It seems that Chen Jiayao, who is young and lively, confident and cheerful, and sweeps the class with her grades every time, is back.