PSLE The bar graph shows the number of storybooks read by a class from August to November. The number of storybooks read in November is not shown.
- What was the percentage increase in the number of storybooks read from August to September?
- The average number of books read in a month from August to November was 60. How many books did the class read in November?
(a)
One interval = 1 u
Increase in the number of storybooks read from August to September
= 9 u - 3 u
= 6 u
Percentage increase in the number of storybooks read from August to September
=
63 x 100%
= 200%
(b)
Total number of storybooks read from August to November
= 4 x 60
= 240
Number of storybooks read from August to October
= 30 + 90 + 40
= 160
Number of storybooks read in November
= 240 - 160
= 80
Answer(s): (a) 200%; (b) 80