Basic 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 impossible event?

Back

0 (or 0%)

Front

How do you calculate the probability of a single event?

Back

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

Front

If a die is rolled, what is the probability of rolling a number less than 7?

Back

1 (or 100%) because all numbers on a die are less than 7.)

Front

In a bag with 5 green, 6 yellow, 8 blue, and 7 brown M&Ms, what is the probability of picking a blue M&M?

Back

8/26 or 4/13.

Front

What is the probability of rolling an odd number on a fair 6-sided die?

Back

1/2.

Front

In a standard deck of cards, what is the probability of drawing an ace?

Back

1/13.

Front

If the probability of an event is 30%, what is the probability that the event does not occur?

Back

70%.

Front

What is a fair die?

Back

A fair die is one where each of the six faces has an equal chance of landing face up.