PSLE On Thursday, the number of children to men to women visiting a bird park was 1 : 10 : 10. On Friday, the number of children visiting the bird park remained the same. However, the number of men increased by 40% and the number of women decreased by 10%.
- What was the ratio of the number of children to men to women visiting the bird park on Friday?
- On Thursday, 460 men and women visited the bird park. What was the total number of visitors at the bird park on Friday?
|
Children |
Men |
Women |
Before |
1 u |
10 u |
10 u |
Change |
|
+ 4 u |
- 1 u |
After |
1 u |
14 u |
9 u |
(a)
Increase in the number of men
= 40% x 10 u
=
40100 x 10 u
= 4 u
Decrease in the number of women
= 10% x 10 u
=
10100 x 10 u
= 1 u
Number of men on Friday
= 10 u + 4 u
= 14 u
Number of women on Friday
= 10 u - 1 u
= 9 u
On Friday
Children : Men : Women
1 : 14 : 9
(b)
Number of men and women on Thursday
= 10 u + 10 u
= 20 u
20 u = 460
1 u = 460 ÷ 20 = 23
Total number of visitors on Friday
= 1 u + 14 u + 9 u
= 24 u
= 24 x 23
= 552
Answer(s): (a) 1 : 14 : 9; (b) 552