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 70. 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
= 6 u - 5 u
= 1 u
Percentage increase in the number of storybooks read from July to August
=
15 x 100%
= 20%
(b)
Total number of storybooks read from July to October
= 4 x 70
= 280
Number of storybooks read from July to September
= 50 + 60 + 70
= 180
Number of storybooks read in October
= 280 - 180
= 100
Answer(s): (a) 20%; (b) 100