Probability of Simple Events

Front

What is the probability of choosing a specific letter from a set of letter tiles?

Back

The probability of choosing a specific letter is calculated by dividing the number of that letter by the total number of letters in the set.

Front

How do you calculate the probability of NOT choosing a specific letter?

Back

To find the probability of NOT choosing a specific letter, subtract the probability of choosing that letter from 1.

Front

If a bucket contains 7 yellow, 6 green, 3 blue, and 8 red golf balls, what is the total number of golf balls?

Back

Total golf balls = 7 (yellow) + 6 (green) + 3 (blue) + 8 (red) = 24 golf balls.

Front

What is the formula for calculating the probability of an event?

Back

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

Front

If there are 8 green golf balls in a bucket of 24 total golf balls, what is the probability of drawing a green ball?

Back

Probability of drawing a green ball = 8/24 = 1/3.

Front

What does it mean if the probability of an event is 0?

Back

A probability of 0 means that the event cannot occur.

Front

What does it mean if the probability of an event is 1?

Back

A probability of 1 means that the event is certain to occur.

Front

In a set of letter tiles, if there are 3 S's, 2 V's, and 4 L's, what is the probability of choosing S, V, or L?

Back

Total S, V, L = 3 + 2 + 4 = 9. If there are 27 tiles total, probability = 9/27 = 1/3.

Front

What is the probability of choosing a letter tile that is not D if there are 9 total tiles?

Back

Probability of NOT choosing D = (Total tiles - Tiles that are D) / Total tiles = (9 - 1) / 9 = 8/9.

Front

If a bowl contains 10 mints: 2 orange, 3 green, and 5 red, what is the probability of choosing an orange mint?

Back

Probability of choosing an orange mint = 2/10 = 1/5.