Probability Review

Front

What is probability?

Back

Probability is a measure of the likelihood that an event will 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?

Back

0 (or 0%)

Front

How do you calculate the probability of a single event?

Back

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

Front

If a jar contains 2 pink, 6 red, and 4 blue marbles, what is the total number of marbles?

Back

12 marbles (2 + 6 + 4 = 12)

Front

What is the probability of picking a red or blue marble from the jar?

Back

5/6 (6 red + 4 blue = 10 favorable outcomes out of 12 total)

Front

What is the probability of flipping a coin and getting heads?

Back

1/2 (There are 2 possible outcomes: heads or tails)

Front

What does 'likely' mean in terms of probability?

Back

An event is likely if its probability is greater than 0.5.

Front

What does 'unlikely' mean in terms of probability?

Back

An event is unlikely if its probability is less than 0.5.

Front

If a spinner has 3 sections colored blue and 9 sections of other colors, what is the probability of landing on blue?

Back

3/12 or 1/4 (3 blue sections out of 12 total)