Basic Probability

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.

Front

What is the probability of an event that is certain to happen?

Back

1 (or 100%)

Front

What is the probability of an event that is impossible to happen?

Back

0 (or 0%)

Front

How do you calculate the probability of an event?

Back

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

Front

If a bag contains 5 quarters, 2 dimes, and 4 pennies, how many coins are there in total?

Back

11 coins (5 + 2 + 4 = 11)

Front

What is the probability of picking a quarter from the bag?

Back

5/11

Front

If there are 8 letters in total and 2 are A's, what is the probability of picking a letter that is not A?

Back

3/4

Front

What is the probability of spinning a color that is not green if the spinner has 1 green and 3 other colors?

Back

3/4

Front

What is the probability of spinning green if the spinner has 1 green and 3 other colors?

Back

1/4

Front

If a spinner has 5 sections and 2 are red, what is the probability of spinning red?

Back

2/5