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 80. 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
= 10 u - 8 u
= 2 u
Percentage increase in the number of storybooks read from January to February
=
28 x 100%
= 25%
(b)
Total number of storybooks read from January to April
= 4 x 80
= 320
Number of storybooks read from January to March
= 80 + 100 + 100
= 280
Number of storybooks read in April
= 320 - 280
= 40
Answer(s): (a) 25%; (b) 40