The graph shows the number of colouring 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 colouring books borrowed by each visitor that Wednesday? Give your answer to the nearest whole number.
(a)
Total number of visitors
= 86 + 56 + 61 + 42 + 80
= 325
(b)
Total number of colouring books borrowed
= 1 x 86 + 2 x 56 + 3 x 61 + 4 x 42 + 5 x 80
= 86 + 112 + 183 + 168 + 400
= 949
Average number of colouring books borrowed
= 949 ÷ 325
= 2.92
≈ 3
Answer(s): (a) 325; (b) 3