PSLE The bar graph shows the number of punchers sold from Jul to Sep. The number of punchers sold is not shown on the scale.
- What was the percentage increase in the number of punchers sold from Jul to Aug?
- There were 144 less punchers sold in Jul than in Sep. How many punchers were sold in Jul?
- The average number of punchers sold from Jul to Nov was 152. What was the average number of punchers sold in Oct and Nov?
(a)
Percentage increase in the number of punchers from Jul to Aug
=
5 - 22 x 100%
=
32 x 100%
= 150%
(b)
Difference in intervals between Sep and Jul
= 10 - 2
= 8
8 intervals → 144
1 interval → 144 ÷ 8 = 18
Number of punchers sold in Jul
= 2 intervals
= 2 x 18
= 36
(c)
Total intervals from Jul to Sep
= 2 + 5 + 10
= 17
Total number of punchers sold from Jul to Sep
= 17 intervals
= 17 x 18
= 306
Total number of punchers sold from Jul to Nov
= 5 x 152
= 760
Number of punchers sold from Oct to Nov
= 760 - 306
= 454
Average number of punchers sold in Oct and Nov
= 454 ÷ 2
= 227
Answer(s): (a) 150%; (b) 36; (c) 227