PSLE On Saturday, the number of children to women to men visiting a safari park was 5 : 6 : 4. On Sunday, the number of children visiting the safari park remained the same. However, the number of women increased by 50% and the number of men decreased by 50%.
- What was the ratio of the number of children to women to men visiting the safari park on Sunday?
- On Saturday, 450 women and men visited the safari park. What was the total number of visitors at the safari park on Sunday?
|
Children |
Women |
Men |
Before |
5 u |
6 u |
4 u |
Change |
|
+ 3 u |
- 2 u |
After |
5 u |
9 u |
2 u |
(a)
Increase in the number of women
= 50% x 6 u
=
50100 x 6 u
= 3 u
Decrease in the number of men
= 50% x 4 u
=
50100 x 4 u
= 2 u
Number of women on Sunday
= 6 u + 3 u
= 9 u
Number of men on Sunday
= 4 u - 2 u
= 2 u
On Sunday
Children : Women : Men
5 : 9 : 2
(b)
Number of women and men on Saturday
= 6 u + 4 u
= 10 u
10 u = 450
1 u = 450 ÷ 10 = 45
Total number of visitors on Sunday
= 5 u + 9 u + 2 u
= 16 u
= 16 x 45
= 720
Answer(s): (a) 5 : 9 : 2; (b) 720