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 80. 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
= 10 u - 8 u
= 2 u
Percentage increase in the number of storybooks read from August to September
=
28 x 100%
= 25%
(b)
Total number of storybooks read from August to November
= 4 x 80
= 320
Number of storybooks read from August to October
= 80 + 100 + 90
= 270
Number of storybooks read in November
= 320 - 270
= 50
Answer(s): (a) 25%; (b) 50