PSLE The bar graph shows the number of storybooks read by a class from April to July. The number of storybooks read in July is not shown.
- What was the percentage increase in the number of storybooks read from April to May?
- The average number of books read in a month from April to July was 70. How many books did the class read in July?
(a)
One interval = 1 u
Increase in the number of storybooks read from April to May
= 10 u - 5 u
= 5 u
Percentage increase in the number of storybooks read from April to May
=
55 x 100%
= 100%
(b)
Total number of storybooks read from April to July
= 4 x 70
= 280
Number of storybooks read from April to June
= 50 + 100 + 90
= 240
Number of storybooks read in July
= 280 - 240
= 40
Answer(s): (a) 100%; (b) 40