PSLE The bar graph shows the number of storybooks read by a class from February to May. The number of storybooks read in May is not shown.
- What was the percentage increase in the number of storybooks read from February to March?
- The average number of books read in a month from February to May was 55. How many books did the class read in May?
(a)
One interval = 1 u
Increase in the number of storybooks read from February to March
= 6 u - 5 u
= 1 u
Percentage increase in the number of storybooks read from February to March
=
15 x 100%
= 20%
(b)
Total number of storybooks read from February to May
= 4 x 55
= 220
Number of storybooks read from February to April
= 50 + 60 + 60
= 170
Number of storybooks read in May
= 220 - 170
= 50
Answer(s): (a) 20%; (b) 50