Probability of Simple Events

Front

What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1, where 0 means the event will not occur and 1 means it will certainly occur.

Front

What is a simple event in probability?

Back

A simple event is an event that consists of a single outcome. For example, rolling a die and getting a 3 is a simple event.

Front

How do you calculate the probability of a simple event?

Back

The probability of a simple event is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.

Front

What is the formula for probability?

Back

Probability (P) = Number of favorable outcomes / Total number of possible outcomes.

Front

If a spinner has 8 equal sections, what is the probability of landing on one specific section?

Back

The probability of landing on one specific section is 1/8.

Front

What does it mean to find the probability of NOT an event?

Back

Finding the probability of NOT an event means calculating the likelihood that the event does not occur, which can be found by subtracting the probability of the event from 1.

Front

What is the probability of NOT rolling a 4 on a standard die?

Back

The probability of NOT rolling a 4 is 5/6, since there are 5 outcomes that are not 4.

Front

In a bag with 3 red, 2 blue, and 5 green marbles, what is the probability of picking a blue marble?

Back

The probability of picking a blue marble is 2/10 or 1/5.

Front

If there are 10 total outcomes and 4 are favorable, what is the probability of a favorable outcome?

Back

The probability of a favorable outcome is 4/10 or 2/5.

Front

What is the probability of choosing either A, C, or D from a set of 8 letters?

Back

If A, C, and D are 3 of the 8 letters, the probability is 3/8.