Question

Based on the histogram, how many students were included in the survey? What percentage of the students surveyed babysat for at most three hours last weekend? Show your work.
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Answer 1

First add up all the heights of the bars

Answer 2

What do you get?

Answer 3

77

Answer 4

should be 80

Answer 5

20+5+30+25 = 80

Answer 6

okay.

Answer 7

now simply divide the number people in the category 0-3 by 80 to get


20/80 = 1/4 = 0.25


Then multiply by 100 to get 0.25*100 = 25%


So 25% of the students surveyed babysat for at most three hours last weekend.