The graph shows the number of colouring books borrowed by visitors at the local library on a Sunday.
- How many visitors visited the local library that Sunday?
- What was the average number of colouring books borrowed by each visitor that Sunday? Give your answer to the nearest whole number.
(a)
Total number of visitors
= 130 + 64 + 28 + 12 + 78
= 312
(b)
Total number of colouring books borrowed
= 1 x 130 + 2 x 64 + 3 x 28 + 4 x 12 + 5 x 78
= 130 + 128 + 84 + 48 + 390
= 780
Average number of colouring books borrowed
= 780 ÷ 312
= 2.5
≈ 3
Answer(s): (a) 312; (b) 3