PSLE
On Friday, the number of children to men to women visiting a tourist attraction was 5 : 12 : 5. On Saturday, the number of children visiting the tourist attraction remained the same. However, the number of men decreased by 25% and the number of women increased by 20%.

1. What was the ratio of the number of adults to children visiting the tourist attraction on Saturday?
2. On Friday, 697 men and women visited the tourist attraction. What was the total number of adult visitors at the tourist attraction on Saturday?

	Children	Men	Women
Before	5 u	12 u	5 u
Change		- 3 u	+ 1 u
After	5 u	9 u	6 u

(a)
Increase in the number of men
= 25% x 12 u
= ²⁵₁₀₀ x 12 u
= 3 u

Decrease in the number of women
= 20% x 5 u
= ²⁰₁₀₀ x 5 u
= 1 u

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

Number of women on Saturday
= 5 u + 1 u
= 6 u

Number of adults on Saturday
= 9 u + 6 u
= 15 u

On Saturday
Adults : Children
15 : 5

(b)
Number of men and women on Friday
= 12 u + 5 u
= 17 u

17 u = 697

1 u = 697 ÷ 17 = 41

Total number of adult visitors on Saturday
= 15 u
= 15 x 41
= 615

Answer(s): (a) 15 : 5; (b) 615