The graph shows the number of non-fiction books borrowed by visitors at the local library on a Saturday.
- How many visitors visited the local library that Saturday?
- What was the average number of non-fiction books borrowed by each visitor that Saturday? Give your answer to the nearest whole number.
(a)
Total number of visitors
= 54 + 37 + 137 + 101 + 22
= 351
(b)
Total number of non-fiction books borrowed
= 3 x 54 + 4 x 37 + 5 x 137 + 6 x 101 + 7 x 22
= 162 + 148 + 685 + 606 + 154
= 1755
Average number of non-fiction books borrowed
= 1755 ÷ 351
= 5
≈ 5
Answer(s): (a) 351; (b) 5