PSLE On Tuesday, the number of children to women to men visiting a bird park was 3 : 5 : 6. On Wednesday, the number of children visiting the bird park remained the same. However, the number of women increased by 40% and the number of men decreased by 50%.
- What was the ratio of the number of children to women to men visiting the bird park on Wednesday?
- On Tuesday, 297 women and men visited the bird park. What was the total number of visitors at the bird park on Wednesday?
|
Children |
Women |
Men |
Before |
3 u |
5 u |
6 u |
Change |
|
+ 2 u |
- 3 u |
After |
3 u |
7 u |
3 u |
(a)
Increase in the number of women
= 40% x 5 u
=
40100 x 5 u
= 2 u
Decrease in the number of men
= 50% x 6 u
=
50100 x 6 u
= 3 u
Number of women on Wednesday
= 5 u + 2 u
= 7 u
Number of men on Wednesday
= 6 u - 3 u
= 3 u
On Wednesday
Children : Women : Men
3 : 7 : 3
(b)
Number of women and men on Tuesday
= 5 u + 6 u
= 11 u
11 u = 297
1 u = 297 ÷ 11 = 27
Total number of visitors on Wednesday
= 3 u + 7 u + 3 u
= 13 u
= 13 x 27
= 351
Answer(s): (a) 3 : 7 : 3; (b) 351