PSLE
On Monday, the number of children to women to men visiting a tourist attraction was 7 : 10 : 5. On Tuesday, the number of children visiting the tourist attraction remained the same. However, the number of women increased by 20% and the number of men decreased by 40%.

1. What was the ratio of the number of children to women to men visiting the tourist attraction on Tuesday?
2. On Monday, 660 women and men visited the tourist attraction. What was the total number of visitors at the tourist attraction on Tuesday?

	Children	Women	Men
Before	7 u	10 u	5 u
Change		+ 2 u	- 2 u
After	7 u	12 u	3 u

(a)
Increase in the number of women
= 20% x 10 u
= ²⁰₁₀₀ x 10 u
= 2 u

Decrease in the number of men
= 40% x 5 u
= ⁴⁰₁₀₀ x 5 u
= 2 u

Number of women on Tuesday
= 10 u + 2 u
= 12 u

Number of men on Tuesday
= 5 u - 2 u
= 3 u

On Tuesday
Children : Women : Men
7 : 12 : 3

(b)
Number of women and men on Monday
= 10 u + 5 u
= 15 u

15 u = 660

1 u = 660 ÷ 15 = 44

Total number of visitors on Tuesday
= 7 u + 12 u + 3 u
= 22 u
= 22 x 44
= 968

Answer(s): (a) 7 : 12 : 3; (b) 968