"The Probability of Staying on the Black Brick" Frequency and Probability PPT Courseware 3

Description

"The Probability of Staying on the Black Brick" Frequency and Probability PPT Courseware 3

learning target

1. Further understand the meaning of probability in specific situations and realize that probability is a mathematical model that describes uncertain phenomena.

2. Understand the calculation method of the probability of a type of event and perform simple calculations.

3. Able to design simple probability models that meet requirements.

review review

1. What is the probability of getting a red ball?

P (touching a red ball) = the number of possible outcomes for drawing a red ball/the number of possible outcomes for drawing any ball

2. What are the probabilities and expressions of the three events?

①The probability of an inevitable event occurring is 1, recorded as P (inevitable event) = 1;

②The probability of an impossible event occurring is 0, recorded as P (impossible event) = 0;

③If A is an uncertain event, then 0＜P(A)＜1

feedback

1. There are 2 white balls and 3 red balls in the bag, a total of 5 balls. They are exactly the same except for the color. Take any ball out of the bag.

P(touch the red ball)=____

P(touch the white ball)=____

P(touch the green ball)=____

P(touch the red or white ball)=_____

2. There are 5 defective products among 100 products. If you randomly pick out 1 product from them, the probability of getting a defective product is __

3. A TV station’s variety show received 400 hotline calls, and now it wants to draw 4 “lucky viewers” ​​from them. Xiaohui has made one hotline call, so the probability of her becoming a lucky viewer is: ____

4. Xiao Ming and Xiao Li are playing a coin tossing game. They toss an even coin twice. If the two heads up are the same, then Xiao Ming wins; if the two heads up are different, then Xiao Li wins. This game Is it fair?

feedback

1. A car driver is going to the mall for shopping, and then he parks the car in a parking lot at will. The parking lot is divided into two areas, A and B. A parking space in the parking lot occupies exactly one square and each square has different colors. The outside is exactly the same, then the probability of the car parking in the blue area of ​​area A is ( ), and the probability of the car parking in the blue area of ​​area B is ( )

2. As shown in Figure A, B, and C, there are three freely rotating turntables. The turntables are equally divided into several sectors (identical except for the color). When the turntable is rotated, the probability that the pointer will point to the white area after it stops is ( ), ( ), ( ).

3. As shown in the picture, the turntable is divided into 8 equal sectors. Please color the appropriate places on the turntable so that the turntable can rotate freely. When it stops rotating, the probability of the pointer falling in the green area is 3/8.

Hands-on:

The kitten walks freely around the floor as shown in the picture. The probability that it will end up on a red square tile is 1/4. You try to paint the color of each tile.

Explore:

A piece of paper with a password written on it is randomly buried in the rectangular area below (each square is the same size).

1. In which area is it most likely to be buried?

2. Calculate the probability of being buried in the three areas;

3. Which two areas have the same probability of being buried?

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"The Probability of Staying on the Black Brick" Frequency and Probability PPT Courseware 2:

"The Probability of Staying on the Black Brick" Frequency and Probability PPT Courseware 2 Review: 1. What is the probability of touching a red ball? P (touching a red ball) = the number of possible results if a red ball is touched/the number of possible results of touching any ball 2. What are the probabilities and expressions of the three events? ①Must...

"The Probability of Staying on the Black Brick" Frequency and Probability PPT courseware:

"The Probability of Staying on the Black Brick" Frequency and Probability PPT Courseware Review and Thoughts 1. What is the probability of touching a red ball? P (touching a red ball) = the number of possible results if a red ball is touched/the number of possible results of touching any ball 2. What are the probabilities and expressions of the three events? ①Must...

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Update Time: 2024-11-22

This template belongs to Mathematics courseware Beijing Normal University seventh grade mathematics volume 2 industry PPT template

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