PSLE On Wednesday, the number of children to women to men visiting a safari park was 1 : 12 : 12. On Thursday, 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 Thursday?
- On Wednesday, 504 women and men visited the safari park. What was the total number of visitors at the safari park on Thursday?
|
Children |
Women |
Men |
Before |
1 u |
12 u |
12 u |
Change |
|
+ 6 u |
- 6 u |
After |
1 u |
18 u |
6 u |
(a)
Increase in the number of women
= 50% x 12 u
=
50100 x 12 u
= 6 u
Decrease in the number of men
= 50% x 12 u
=
50100 x 12 u
= 6 u
Number of women on Thursday
= 12 u + 6 u
= 18 u
Number of men on Thursday
= 12 u - 6 u
= 6 u
On Thursday
Children : Women : Men
1 : 18 : 6
(b)
Number of women and men on Wednesday
= 12 u + 12 u
= 24 u
24 u = 504
1 u = 504 ÷ 24 = 21
Total number of visitors on Thursday
= 1 u + 18 u + 6 u
= 25 u
= 25 x 21
= 525
Answer(s): (a) 1 : 18 : 6; (b) 525