PSLE The bar graph shows the number of storybooks read by a class from July to October. The number of storybooks read in October is not shown.
- What was the percentage increase in the number of storybooks read from July to August?
- The average number of books read in a month from July to October was 55. How many books did the class read in October?
(a)
One interval = 1 u
Increase in the number of storybooks read from July to August
= 9 u - 3 u
= 6 u
Percentage increase in the number of storybooks read from July to August
=
63 x 100%
= 200%
(b)
Total number of storybooks read from July to October
= 4 x 55
= 220
Number of storybooks read from July to September
= 30 + 90 + 40
= 160
Number of storybooks read in October
= 220 - 160
= 60
Answer(s): (a) 200%; (b) 60