Question

at their family reunion, the boyer family recorded everyones age. how many people are there in all?

Explanation:

Step1: Identify bar - heights for each age - group

From the bar - chart, the number of people in the age - group 1 - 20 is 15, in 21 - 40 is 10, in 41 - 60 is 5, and in 61 - 80 is 20, and in 81 - 100 is 0.

Step2: Sum up the number of people in all age - groups

$15 + 10+5 + 20+0=50$

Answer:

50