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 - 5 u
= 5 u
Percentage increase in the number of storybooks read from August to September
=
55 x 100%
= 100%
(b)
Total number of storybooks read from August to November
= 4 x 80
= 320
Number of storybooks read from August to October
= 50 + 100 + 80
= 230
Number of storybooks read in November
= 320 - 230
= 90
Answer(s): (a) 100%; (b) 90