Basic Probability Practice

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

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

Back

70% (100% - 30%)

Front

How do you calculate the probability of picking a specific item from a group?

Back

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

Front

In a bag with 5 quarters, 2 dimes, and 4 pennies, what is the probability of picking a quarter?

Back

5/11

Front

What is conditional probability?

Back

Conditional probability is the probability of an event occurring given that another event has already occurred.

Front

If the probability of a boy speaking German is 0.7273, what does this represent?

Back

This represents the conditional probability of picking a boy given that the person speaks German.

Front

What is the probability of spinning a spinner and landing on RED if it has 2 red sections out of 4 total sections?

Back

50% (2 out of 4 sections are red)

Front

What is the probability of rolling a six on a standard six-sided die?

Back

1/6