PSLE On Tuesday, the number of children to women to men visiting a park was 1 : 8 : 10. On Wednesday, the number of children visiting the park remained the same. However, the number of women decreased by 25% and the number of men increased by 50%.
- What was the ratio of the number of adults to children visiting the park on Wednesday?
- On Tuesday, 792 women and men visited the park. What was the total number of adult visitors at the park on Wednesday?
|
Children |
Women |
Men |
Before |
1 u |
8 u |
10 u |
Change |
|
- 2 u |
+ 5 u |
After |
1 u |
6 u |
15 u |
(a)
Increase in the number of women
= 25% x 8 u
=
25100 x 8 u
= 2 u
Decrease in the number of men
= 50% x 10 u
=
50100 x 10 u
= 5 u
Number of women on Wednesday
= 8 u - 2 u
= 6 u
Number of men on Wednesday
= 10 u + 5 u
= 15 u
Number of adults on Wednesday
= 6 u + 15 u
= 21 u
On Wednesday
Adults : Children
21 : 1
(b)
Number of women and men on Tuesday
= 8 u + 10 u
= 18 u
18 u = 792
1 u = 792 ÷ 18 = 44
Total number of adult visitors on Wednesday
= 21 u
= 21 x 44
= 924
Answer(s): (a) 21 : 1; (b) 924