"Random Events" Probability Preliminary PPT Teaching Courseware

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"Random Events" Probability Preliminary PPT Teaching Courseware

Part One: Learning Objectives

Can make accurate judgments on inevitable events, impossible events and random events.

Summarize the characteristics of inevitable events, impossible events and random events. (Key points)

Know the probability of an event happening.

Random event PPT, part 2: introduction of scenarios

"Meeting Gift" Game Rules

Put 1, 2, and 3 candies in the three boxes respectively, then shuffle the order of the boxes, and let students A, B, and C choose a box as a meeting gift!

Please answer the question

Which of the following are bound to happen, which are unlikely to happen, and which may or may not happen?

(1). The box chosen by student A contains candies.

(2). There are 4 candies in the box chosen by the students.

(3). There are 2 candies in the box chosen by Student C.

(4). The sun sets from the west.

(5). The weather will drop to -150℃ tomorrow.

(6) If you buy lottery tickets tomorrow, you will win 5 million.

Summary

We call the above events (1) and (4) inevitable events, events (2) and (5) as impossible events, and events (3) and (6) as random events.

Classification and characteristics of events

Determine event

Inevitable events: Under certain conditions, some events are bound to happen.

Impossible events: Under certain conditions, some events will definitely not happen.

Random event: An event that may or may not occur under certain conditions.

Random events PPT, the third part: exploring new knowledge

probability of random events occurring

game rules:

There are 6 playing cards with the same pattern on the back on the table, including 4 spades and 2 hearts. Ask a student to randomly draw a playing card from them.

(1) If a spade is drawn, the student wins and gets a gift!

(2) If the teacher draws a heart and wins, the students will give the teacher a gift!

There are 6 playing cards with the same pattern on the back on the table, including 4 spades and 2 hearts. Ask a classmate to randomly draw a playing card from the pile.

(1) Can the suit of the drawn playing cards be determined in advance?

(2) Which suit of playing cards do you think is more likely to be drawn?

(3) Can the probability of "drawing a spade" and "drawing a heart" be the same by changing the number of playing cards of a certain suit?

Characteristics of random events

What inspirations can you get from the above games?

normally,

1. The possibility of random events occurring varies;

2. The probability of different random events occurring may be different.

Random events PPT, Part 4: Consolidation exercises

1. Are the following events inevitable, impossible or random?

(1) Basketball star Jeremy Lin shot 10 times and hit every time.

(2) Turn on the TV and a newsreel showing China’s new aircraft carrier carrier-based aircraft training is playing.

(3) The sum of the interior angles of a triangle is 181 degrees.

(4) The area of ​​a rectangle with side lengths 2 and 3 is 6.

2. It is known that the ratio of land area to ocean area on the earth's surface is about 3:7. If a meteorite flies from the universe and falls on the earth, the probability of "falling in the ocean" ( ) "falling on land" possibility.

A. Greater than B. Equal to C. Less than D. All three situations are possible

3. If there are 4 black balls and x white balls in the bag, and one is randomly drawn from the bag, the probability of "drawing out the white ball" and "drawing out the black ball" are the same, then x=____.

Random event PPT, part 5: expansion and improvement

Can you name a few idioms related to inevitable events, random events, and impossible events? No limit to quantity, try your best!

For example: an inevitable event: if you sow melons, you will get melons, if you sow beans, you will get beans. Black and white are clear.

Random events: mirage, wait and see.

Impossible event: The sea is drying up and the rocks are rotting, painting cakes to satisfy hunger, and destroying seedlings.

Random events PPT, part six: knowledge review

Determine event

impossible event

inevitable event

Random events

definition

Features

Features: Generally, the probability of a random event occurring is different, and the probability of different random events may be different.

Keywords: Free download of PPT courseware for mathematics in the first volume of the ninth grade of the People's Education Press, download of random event PPT, download of preliminary probability PPT, .PPT format;

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

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Update Time: 2024-11-20

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

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