The graph shows the number of 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 books borrowed by each visitor that Saturday? Give your answer to the nearest whole number.
(a)
Total number of visitors
= 54 + 69 + 91 + 58 + 118
= 390
(b)
Total number of books borrowed
= 1 x 54 + 2 x 69 + 3 x 91 + 4 x 58 + 5 x 118
= 54 + 138 + 273 + 232 + 590
= 1287
Average number of books borrowed
= 1287 ÷ 390
= 3.3
≈ 3
Answer(s): (a) 390; (b) 3