PSLE On Wednesday, the number of children to women to men visiting a fun fair was 1 : 12 : 4. On Thursday, the number of children visiting the fun fair remained the same. However, the number of women increased by 25% and the number of men decreased by 25%.
- What was the ratio of the number of children to women to men visiting the fun fair on Thursday?
- On Wednesday, 768 women and men visited the fun fair. What was the total number of visitors at the fun fair on Thursday?
|
Children |
Women |
Men |
Before |
1 u |
12 u |
4 u |
Change |
|
+ 3 u |
- 1 u |
After |
1 u |
15 u |
3 u |
(a)
Increase in the number of women
= 25% x 12 u
=
25100 x 12 u
= 3 u
Decrease in the number of men
= 25% x 4 u
=
25100 x 4 u
= 1 u
Number of women on Thursday
= 12 u + 3 u
= 15 u
Number of men on Thursday
= 4 u - 1 u
= 3 u
On Thursday
Children : Women : Men
1 : 15 : 3
(b)
Number of women and men on Wednesday
= 12 u + 4 u
= 16 u
16 u = 768
1 u = 768 ÷ 16 = 48
Total number of visitors on Thursday
= 1 u + 15 u + 3 u
= 19 u
= 19 x 48
= 912
Answer(s): (a) 1 : 15 : 3; (b) 912