PSLE
On Wednesday, the number of children to women to men visiting a fun fair was 5 : 8 : 12. On Thursday, the number of children visiting the fun fair remained the same. However, the number of women increased by 50% and the number of men decreased by 25%.

1. What was the ratio of the number of children to women to men visiting the fun fair on Thursday?
2. On Wednesday, 920 women and men visited the fun fair. What was the total number of visitors at the fun fair on Thursday?

	Children	Women	Men
Before	5 u	8 u	12 u
Change		+ 4 u	- 3 u
After	5 u	12 u	9 u

(a)
Increase in the number of women
= 50% x 8 u
= ⁵⁰₁₀₀ x 8 u
= 4 u

Decrease in the number of men
= 25% x 12 u
= ²⁵₁₀₀ x 12 u
= 3 u

Number of women on Thursday
= 8 u + 4 u
= 12 u

Number of men on Thursday
= 12 u - 3 u
= 9 u

On Thursday
Children : Women : Men
5 : 12 : 9

(b)
Number of women and men on Wednesday
= 8 u + 12 u
= 20 u

20 u = 920

1 u = 920 ÷ 20 = 46

Total number of visitors on Thursday
= 5 u + 12 u + 9 u
= 26 u
= 26 x 46
= 1196

Answer(s): (a) 5 : 12 : 9; (b) 1196