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
= 78 + 24 + 44 + 17 + 137
= 300
(b)
Total number of non-fiction books borrowed
= 1 x 78 + 2 x 24 + 3 x 44 + 4 x 17 + 5 x 137
= 78 + 48 + 132 + 68 + 685
= 1011
Average number of non-fiction books borrowed
= 1011 ÷ 300
= 3.37
≈ 3
Answer(s): (a) 300; (b) 3