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 50. 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
= 5 u - 4 u
= 1 u
Percentage increase in the number of storybooks read from June to July
=
14 x 100%
= 25%
(b)
Total number of storybooks read from June to September
= 4 x 50
= 200
Number of storybooks read from June to August
= 40 + 50 + 60
= 150
Number of storybooks read in September
= 200 - 150
= 50
Answer(s): (a) 25%; (b) 50