The graph shows the number of non-fiction books borrowed by visitors at the local library on a Tuesday.
- How many visitors visited the local library that Tuesday?
- What was the average number of non-fiction books borrowed by each visitor that Tuesday? Give your answer to the nearest whole number.
(a)
Total number of visitors
= 10 + 135 + 56 + 33 + 16
= 250
(b)
Total number of non-fiction books borrowed
= 5 x 10 + 6 x 135 + 7 x 56 + 8 x 33 + 9 x 16
= 50 + 810 + 392 + 264 + 144
= 1660
Average number of non-fiction books borrowed
= 1660 ÷ 250
= 6.64
≈ 7
Answer(s): (a) 250; (b) 7