PSLE On Tuesday, the number of children to men to women visiting a safari park was 5 : 10 : 4. On Wednesday, the number of children visiting the safari park remained the same. However, the number of men increased by 10% and the number of women decreased by 25%.
- What was the ratio of the number of children to men to women visiting the safari park on Wednesday?
- On Tuesday, 462 men and women visited the safari park. What was the total number of visitors at the safari park on Wednesday?
|
Children |
Men |
Women |
Before |
5 u |
10 u |
4 u |
Change |
|
+ 1 u |
- 1 u |
After |
5 u |
11 u |
3 u |
(a)
Increase in the number of men
= 10% x 10 u
=
10100 x 10 u
= 1 u
Decrease in the number of women
= 25% x 4 u
=
25100 x 4 u
= 1 u
Number of men on Wednesday
= 10 u + 1 u
= 11 u
Number of women on Wednesday
= 4 u - 1 u
= 3 u
On Wednesday
Children : Men : Women
5 : 11 : 3
(b)
Number of men and women on Tuesday
= 10 u + 4 u
= 14 u
14 u = 462
1 u = 462 ÷ 14 = 33
Total number of visitors on Wednesday
= 5 u + 11 u + 3 u
= 19 u
= 19 x 33
= 627
Answer(s): (a) 5 : 11 : 3; (b) 627