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
= 6 u - 3 u
= 3 u
Percentage increase in the number of storybooks read from June to July
=
33 x 100%
= 100%
(b)
Total number of storybooks read from June to September
= 4 x 50
= 200
Number of storybooks read from June to August
= 30 + 60 + 50
= 140
Number of storybooks read in September
= 200 - 140
= 60
Answer(s): (a) 100%; (b) 60