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.

Tags

CCSS.7.SP.C.7B

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.

Tags

CCSS.HSS.CP.B.7

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.

Tags

CCSS.2.OA.A.1

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).

Tags

CCSS.7.SP.C.7A

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.

Tags

CCSS.7.SP.C.7B

Front

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

Back

A probability of 0 means that the event cannot occur.

Tags

CCSS.7.SP.C.5

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.

Tags

CCSS.7.SP.C.5

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.

Tags

CCSS.HSS.CP.B.7

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.

Tags

CCSS.HSS.CP.B.7

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.

Tags

CCSS.7.SP.C.7B