Relative Frequency

Front

What is relative frequency?

Back

Relative frequency is the ratio of the number of times an event occurs to the total number of trials or observations. It is often expressed as a fraction, decimal, or percentage.

Front

How do you calculate relative frequency?

Back

Relative frequency = (Number of times an event occurs) / (Total number of trials)

Front

What is the relative frequency of an event that occurs 5 times out of 20 trials?

Back

Relative frequency = 5/20 = 0.25 or 25%.

Front

If 10 out of 50 students prefer chocolate ice cream, what is the relative frequency of students who prefer chocolate?

Back

Relative frequency = 10/50 = 0.2 or 20%.

Front

What does a relative frequency of 0.5 indicate?

Back

A relative frequency of 0.5 indicates that the event occurs 50% of the time.

Front

In a survey, 15 out of 60 people said they like pizza. What is the relative frequency of people who like pizza?

Back

Relative frequency = 15/60 = 0.25 or 25%.

Front

What is the relative frequency of boys among 30 students if 12 are boys?

Back

Relative frequency = 12/30 = 0.4 or 40%.

Front

If a die is rolled 60 times and a 3 is rolled 15 times, what is the relative frequency of rolling a 3?

Back

Relative frequency = 15/60 = 0.25 or 25%.

Front

What is the relative frequency of students who do not have an A average in a class of 25 students where 80% have an A average?

Back

20% of 25 students = 0.2 * 25 = 5 students.

Front

If 8 out of 32 students eat breakfast, what is the relative frequency of students who eat breakfast?

Back

Relative frequency = 8/32 = 0.25 or 25%.