Practice!

Sample Problem

A group of people were surveyed for how many movies they see in a week. The table below shows the results of the survey.

Total movies seen

0

1

2

3

4

5

Number of people

4

3

10

7

12

3

(a) How many people took part in the survey?

people

(b) What was the total number of movies seen in a week by all the survey takers?

movies

(c) What was the average number of movies seen in a week per person surveyed? Round your answer to the nearest whole number.

movies

Solution

(a) Total number of people: 4 + 3 + 10 + 7 + 12 + 3 = 39

(b) Total number of movies seen = (0 × 4) + (1 × 3) + (2 × 10) + (3 × 7) + (4 × 12) + (5 × 3) = 107

(c) Average number of movies seen per person = 107 ÷ 39 = 2.74258974 ≈ 3