The graph shows the number of story books borrowed by visitors at the local library on a Saturday.
- How many visitors visited the local library that Saturday?
- What was the average number of story books borrowed by each visitor that Saturday? Give your answer to the nearest whole number.
(a)
Total number of visitors
= 58 + 117 + 10 + 23 + 105
= 313
(b)
Total number of story books borrowed
= 1 x 58 + 2 x 117 + 3 x 10 + 4 x 23 + 5 x 105
= 58 + 234 + 30 + 92 + 525
= 939
Average number of story books borrowed
= 939 ÷ 313
= 3
≈ 3
Answer(s): (a) 313; (b) 3