The graph shows the number of 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 books borrowed by each visitor that Saturday? Give your answer to the nearest whole number.
(a)
Total number of visitors
= 34 + 56 + 90 + 82 + 138
= 400
(b)
Total number of books borrowed
= 4 x 34 + 5 x 56 + 6 x 90 + 7 x 82 + 8 x 138
= 136 + 280 + 540 + 574 + 1104
= 2634
Average number of books borrowed
= 2634 ÷ 400
= 6.585
≈ 7
Answer(s): (a) 400; (b) 7