PSLE The bar graph shows the number of storybooks read by a class from March to June. The number of storybooks read in March is not shown.
- What was the percentage decrease in the number of storybooks read from May to June?
- The average number of books read in a month from March to June was 50. How many books did the class read in March?
(a)
One interval = 1 u
Decrease in the number of storybook reads from May to June
= 6 u - 3 u
= 3 u
Percentage increase in the number of storybooks read from from May to June
=
36 x 100%
= 50%
(b)
Total number of storybooks read from March to June
= 4 x 50
= 200
Number of storybooks read from April to June
= 80 + 60 + 30
= 170
Number of storybooks read in March
= 200 - 170
= 30
Answer(s): (a) 50%; (b) 30