PSLE The bar graph shows the number of storybooks read by a class from June to September. The number of storybooks read in September is not shown.
- What was the percentage increase in the number of storybooks read from June to July?
- The average number of books read in a month from June to September was 90. How many books did the class read in September?
(a)
One interval = 1 u
Increase in the number of storybooks read from June to July
= 10 u - 8 u
= 2 u
Percentage increase in the number of storybooks read from June to July
=
28 x 100%
= 25%
(b)
Total number of storybooks read from June to September
= 4 x 90
= 360
Number of storybooks read from June to August
= 80 + 100 + 100
= 280
Number of storybooks read in September
= 360 - 280
= 80
Answer(s): (a) 25%; (b) 80