PSLE The bar graph shows the number of storybooks read by a class from January to April. The number of storybooks read in April is not shown.
- What was the percentage increase in the number of storybooks read from January to February?
- The average number of books read in a month from January to April was 45. How many books did the class read in April?
(a)
One interval = 1 u
Increase in the number of storybooks read from January to February
= 6 u - 3 u
= 3 u
Percentage increase in the number of storybooks read from January to February
=
33 x 100%
= 100%
(b)
Total number of storybooks read from January to April
= 4 x 45
= 180
Number of storybooks read from January to March
= 30 + 60 + 40
= 130
Number of storybooks read in April
= 180 - 130
= 50
Answer(s): (a) 100%; (b) 50