PSLE The bar graph shows the number of punchers sold from Jan to Mar. The number of punchers sold is not shown on the scale.
- What was the percentage increase in the number of punchers sold from Jan to Feb?
- There were 80 less punchers sold in Jan than in Mar. How many punchers were sold in Jan?
- The average number of punchers sold from Jan to May was 142. What was the average number of punchers sold in Apr and May?
(a)
Percentage increase in the number of punchers from Jan to Feb
=
5 - 22 x 100%
=
32 x 100%
= 150%
(b)
Difference in intervals between Mar and Jan
= 10 - 2
= 8
8 intervals → 80
1 interval → 80 ÷ 8 = 10
Number of punchers sold in Jan
= 2 intervals
= 2 x 10
= 20
(c)
Total intervals from Jan to Mar
= 2 + 5 + 10
= 17
Total number of punchers sold from Jan to Mar
= 17 intervals
= 17 x 10
= 170
Total number of punchers sold from Jan to May
= 5 x 142
= 710
Number of punchers sold from Apr to May
= 710 - 170
= 540
Average number of punchers sold in Apr and May
= 540 ÷ 2
= 270
Answer(s): (a) 150%; (b) 20; (c) 270