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 55. 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
= 8 u - 4 u
= 4 u
Percentage increase in the number of storybooks read from January to February
=
44 x 100%
= 100%
(b)
Total number of storybooks read from January to April
= 4 x 55
= 220
Number of storybooks read from January to March
= 40 + 80 + 40
= 160
Number of storybooks read in April
= 220 - 160
= 60
Answer(s): (a) 100%; (b) 60