"Calculating Probability Using Drawing Tree Diagrams and Lists" PPT Courseware 2

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"Calculating Probability Using Drawing Tree Diagrams and Lists" PPT Courseware 2

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What methods did you learn in the last class to calculate probability?

1. Draw a tree diagram

2. List

teaching objectives

1. Proficient in using tree diagrams and lists to calculate the probability of random events;

2. By drawing tree diagrams and lists, students can further experience the superiority of these two methods for enumerating all the results of specified events.

practise:

There are four identical small balls in a pocket. They are numbered 1, 2, 3, and 4 respectively. The methods used by Xiao Ming and Xiao Qiang to touch the balls are:

Xiao Ming: Pick one at random and write down the number, then put it back, then pick another at random and write down the number.

Xiaoqiang: Pick one at random and write down the number. Do not put it back. Then pick another one at random and write down the number.

(1) Represent all possible results of Xiao Ming and Xiao Qiang touching the ball;

(2) Find the probability that the sum of the numbers of Xiao Ming and Xiao Qiang touching the ball twice is equal to 5.

Track training

As shown in the picture, there are two identical balls in the bag, marked with the numbers "1" and "2" respectively. Xiao Ming designed a game: the player randomly takes out a ball from the bag each time and freely rotates the ball in the picture. The turntable (the turntable is divided into three equal sectors).

The rules of the game are:

If the sum of the number on the touched ball and the number turned out on the turntable is 2, then the player wins. Find the probability of the player winning.

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For more information about the PPT courseware "Using Drawing Tree Diagrams and Lists to Calculate Probabilities", please click the Use Drawing Tree Diagrams and Lists to Calculate Probabilities PPT tag.

"Calculating Probability Using Drawing Tree Diagrams and Lists" PPT courseware:

"Calculating Probabilities by Drawing Tree Diagrams and Lists" PPT courseware learning objectives 1. Be able to use the method of drawing tree diagrams to find the probabilities of simple events; 2. Be able to use the list method to find the probabilities of simple events. Review the past and learn the new 1. Three types of events The probability and expression of occurrence: ①The inevitable event will happen..

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Update Time: 2024-10-19

This template belongs to Mathematics courseware Qingdao Edition Ninth Grade Mathematics Volume 2 industry PPT template

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