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 70. 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
= 10 u - 5 u
= 5 u
Percentage increase in the number of storybooks read from February to March
=
55 x 100%
= 100%
(b)
Total number of storybooks read from February to May
= 4 x 70
= 280
Number of storybooks read from February to April
= 50 + 100 + 100
= 250
Number of storybooks read in May
= 280 - 250
= 30
Answer(s): (a) 100%; (b) 30