PSLE
On Thursday, the number of children to men to women visiting a fun fair was 7 : 10 : 4. On Friday, the number of children visiting the fun fair remained the same. However, the number of men increased by 30% and the number of women decreased by 50%.

1. What was the ratio of the number of children to men to women visiting the fun fair on Friday?
2. On Thursday, 448 men and women visited the fun fair. What was the total number of visitors at the fun fair on Friday?

	Children	Men	Women
Before	7 u	10 u	4 u
Change		+ 3 u	- 2 u
After	7 u	13 u	2 u

(a)
Increase in the number of men
= 30% x 10 u
= ³⁰₁₀₀ x 10 u
= 3 u

Decrease in the number of women
= 50% x 4 u
= ⁵⁰₁₀₀ x 4 u
= 2 u

Number of men on Friday
= 10 u + 3 u
= 13 u

Number of women on Friday
= 4 u - 2 u
= 2 u

On Friday
Children : Men : Women
7 : 13 : 2

(b)
Number of men and women on Thursday
= 10 u + 4 u
= 14 u

14 u = 448

1 u = 448 ÷ 14 = 32

Total number of visitors on Friday
= 7 u + 13 u + 2 u
= 22 u
= 22 x 32
= 704

Answer(s): (a) 7 : 13 : 2; (b) 704