"Probability" Preliminary Probability PPT (Lesson 2)

Description

"Probability" Preliminary Probability PPT (Lesson 2)

Part One: Learning Objectives

1. Understand the meaning of probability.

2. Master the method of finding probability.

Probability PPT, the second part: analysis of example questions, deepening and improving

Example 1 A turntable that can rotate freely. The turntable is divided into 7 sectors of the same size and the colors are divided into three colors: red, green and yellow. The position of the pointer is fixed. After the rotating turntable stops, one of the sectors will stop exactly at the position pointed by the pointer (when the pointer points to the intersection of two sectors, it is regarded as pointing to the right sector). Find the probability of the following events:

(1) The pointer points to red;

(2) The pointer points to red or yellow;

(3) The pointer does not point to red.

Example 2 The picture below shows the screen of the "Mine Sweeper" game on the computer. In a square minefield with 9×9 squares, 10 mines are randomly buried, and only 1 mine can be buried in each square.

Xiao Wang randomly clicked on a square at the beginning of the game. After clicking, the situation as shown in the picture appeared. We mark the square adjacent to the square labeled 3 as area A (lined part), and the part outside area A as area B. The number 3 indicates that there are 3 mines buried in area A. Should you click on area A or area B next?

Probability PPT, the third part: practice consolidation and comprehensive application

1. There are 24 black balls and 2 white balls in the bag. The shape, size, texture, etc. of these balls are exactly the same. Under the condition that the ball cannot be seen, a ball is randomly taken out of the bag. The probability of finding the black ball is Is it bigger, or is the probability of getting a white ball greater? Give reasons.

2. An opaque bag contains a total of 100 balls of three colors: red, yellow, and white. They are all the same except for color. The number of yellow balls is 5 less than twice the number of white balls. It is known that the probability that a ball drawn from the bag is a red ball is 3/10.

(1) Find the number of red balls in the bag;

(2) Find the probability that a ball drawn from the bag is a white ball;

(3) After taking away 10 balls (including no red balls), find the probability that one of the remaining balls in the bag is a red ball.

Probability PPT, Part 4: Class Summary

1. Definition of probability:

Generally speaking, for a random event A, we call the numerical value that describes the possibility of its occurrence the probability of the occurrence of the random event A. Representation method: The probability of event A is expressed as P(A).

2. Probability method:

Generally speaking, if there are n possible outcomes in an experiment, and they are all equally likely to occur. Event A contains m outcomes, then the probability of event A occurring is.

Among them, 0≤P(A)≤1, when A is an inevitable event, P(A)=1; when A is an impossible event, P(A)=0.

Keywords: Free download of PPT courseware for ninth grade mathematics from the People's Education Press, download of probability PPT, download of preliminary probability PPT, .PPT format;

For more information about the "Probability Preliminary Probability" PPT courseware, please click the Probability Preliminary PPT Probability PPT tab.

"Using Frequency to Estimate Probability" PPT teaching courseware for further understanding of probability:

"Using Frequency to Estimate Probability" PPT teaching courseware for further understanding of probability, 13 pages in total. Basics of knowledge points Knowledge point 1 The relationship between frequency and probability 1. Regarding the relationship between frequency and probability, the correct statement below is (B) A. Frequency is equal to probability B. When the number of trials is very...

"Using Frequency to Estimate Probability" PPT download for further understanding of probability:

"Using Frequency to Estimate Probability" PPT download for further understanding of probability, 16 pages in total. Learning objectives 1. Know that through a large number of repeated experiments, frequency can be used to estimate probability; (key point) 2. Understand the feasibility of alternative simulation experiments. ... ... ... Teach a new lesson using frequency..

"Using Frequency to Estimate Probability" PPT for further understanding of probability:

"Using Frequency to Estimate Probability" PPT for further understanding of probability, 24 pages in total. Learning objectives: Use frequency to estimate the probability of equally possible events. Use frequency to estimate the probability of non-equally possible events. ... ... Understand new knowledge. Knowledge points: Use frequency to estimate, etc.

File Info

Update Time: 2024-09-11

This template belongs to Mathematics courseware People's Education Press Ninth Grade Mathematics Volume 1 industry PPT template

Preview