The graph shows the number of non-fiction books borrowed by visitors at the local library on a Friday.
- How many visitors visited the local library that Friday?
- What was the average number of non-fiction books borrowed by each visitor that Friday? Give your answer to the nearest whole number.
(a)
Total number of visitors
= 36 + 29 + 20 + 66 + 99
= 250
(b)
Total number of non-fiction books borrowed
= 1 x 36 + 2 x 29 + 3 x 20 + 4 x 66 + 5 x 99
= 36 + 58 + 60 + 264 + 495
= 913
Average number of non-fiction books borrowed
= 913 ÷ 250
= 3.652
≈ 4
Answer(s): (a) 250; (b) 4