The graph shows the number of books borrowed by visitors at the local library on a Wednesday.
- How many visitors visited the local library that Wednesday?
- What was the average number of books borrowed by each visitor that Wednesday? Give your answer to the nearest whole number.
(a)
Total number of visitors
= 36 + 73 + 138 + 135 + 68
= 450
(b)
Total number of books borrowed
= 2 x 36 + 3 x 73 + 4 x 138 + 5 x 135 + 6 x 68
= 72 + 219 + 552 + 675 + 408
= 1926
Average number of books borrowed
= 1926 ÷ 450
= 4.28
≈ 4
Answer(s): (a) 450; (b) 4