"Random Events" Probability Preliminary PPT Courseware 2

Description

"Random Events" Probability Preliminary PPT Courseware 2

teaching objectives

1. Understand the concepts of inevitable events, impossible events, and random events.

2. Be able to judge which events are inevitable events, which events are impossible events, and which events are random events.

3. Understand that the likelihood of different random events may be different.

Teaching focus

Master the definitions of inevitable events, impossible events, and random events.

Teaching difficulties

Determine which events in real life are random.

Definition 1: An event that must happen under certain conditions is called an inevitable event.

For example: ① Firewood burns and generates heat;

Condition: Firewood burning; Result: Heat generated

②Throw a stone and it will fall.

Condition: Throw a stone; Result: Whereabouts

Definition 2: An event that is impossible to occur under certain conditions is called an impossible event.

For example: ③ At normal temperature, steel melts;

Condition: Normal temperature; Result: Steel melts

④Under standard atmospheric pressure and when the temperature is below 0°C, ice melts.

Conditions: Standard atmospheric pressure and temperature below 0oC; Result: Ice melts

Definition 3: Events that may or may not occur under certain conditions are called random events.

For example: ⑤ Toss a coin, heads up;

Condition: Toss a coin; Result: Heads

⑥Someone shoots once and hits the target.

Condition: Shoot once; Result: Hit the target

induction

Generally speaking, the probability of a random event occurring has a certain level, and the probability of different random events occurring may be different.

think

Can the probability of "finding a black ball" and "finding a white ball" be the same by changing the number of balls of a certain color in the bag?

Class summary

1. Events that must occur under certain conditions are called inevitable events.

2. An event that is impossible to occur under certain conditions is called an impossible event.

3. Events that may or may not occur under certain conditions are called random events.

4. Generally speaking, the probability of random events occurring varies. The probability of different random events occurring may be different.

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

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File Info

Update Time: 2024-09-05

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

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