PSLE The bar graph shows the number of glues sold from Jul to Sep. The number of glues sold is not shown on the scale.
- What was the percentage increase in the number of glues sold from Jul to Aug?
- There were 152 less glues sold in Jul than in Sep. How many glues were sold in Jul?
- The average number of glues sold from Jul to Nov was 199. What was the average number of glues sold in Oct and Nov?
(a)
Percentage increase in the number of glues 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 → 152
1 interval → 152 ÷ 8 = 19
Number of glues sold in Jul
= 2 intervals
= 2 x 19
= 38
(c)
Total intervals from Jul to Sep
= 2 + 5 + 10
= 17
Total number of glues sold from Jul to Sep
= 17 intervals
= 17 x 19
= 323
Total number of glues sold from Jul to Nov
= 5 x 199
= 995
Number of glues sold from Oct to Nov
= 995 - 323
= 672
Average number of glues sold in Oct and Nov
= 672 ÷ 2
= 336
Answer(s): (a) 150%; (b) 38; (c) 336