"Probability" Probability preliminary PPT

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"Probability" Probability preliminary PPT

The first part: the famous teacher’s eye-catching

Knowledge point 1: The meaning of probability

Generally, for a random event A, we call the numerical value that describes the possibility of its occurrence called the probability of the occurrence of the random event A, denoted as P(A).

Knowledge point 2: Calculation of probability

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

Probability PPT, part 2: basic passing

1. Which of the following statements is correct ()

A. The probability of an impossible event happening is 0

B. The probability of a random event occurring is 1/2

C． Events with low probability cannot happen

D． If you toss a coin of uniform texture 1000 times, the number of heads it will land on is 500.

2. Which of the following statements is correct ()

A. There are 5 red balls and 1 white ball in the bag with exactly the same shape, size and texture. A ball is randomly selected from them and must be a red ball.

B. The weather forecast "10% probability of precipitation tomorrow" means that it will rain 10% of the time tomorrow.

C． A welfare lottery is issued in a certain place, and the winning rate is one in a thousand. If you buy 1,000 such lottery tickets, you will definitely win.

D． If a coin of uniform texture is tossed continuously, if it lands heads 5 times, it may still land heads the sixth time.

Probability PPT, the third part: ability improvement

8. [Inner Mongolia Ordos High School Entrance Examination] The following calculations: ①√9＝±3; ②3a2-2a＝a; ③(2a2)3＝6a6; ④a8÷a4＝a2; ⑤3√-27＝-3, any one of them is selected and the calculation result is The correct probability is ()

A. 1/5 B． 2/5

C． 3/5 D. 4/5

9. [Guizhou Bijie High School Entrance Exam] In the parallelogram ABCD, AC and BD are two diagonals. Now from the following four relationships: ①AB=BC; ②AC=BD; ③AC⊥BD; ④AB⊥BC. Randomly select one as the condition, that is It can be deduced that the probability that parallelogram ABCD is a rhombus is ()

A. 1/4 B． 1/2

C． 3/4 D. 1

Probability PPT, part 4: thinking training

13. From the five numbers -2, -1, 0, 1, 2, randomly select a number and record it as a. Find the solution of the set of inequalities about x 2x-16≥-12, 2x-1<2a, and let The probability that the solution of the linear equation of one variable 3x-a2+1=2x+a3 about x is a negative number.

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

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Update Time: 2024-11-27

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

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