PSLE
On Friday, the number of children to women to men visiting a tourist attraction was 5 : 4 : 5. On Saturday, the number of children visiting the tourist attraction remained the same. However, the number of women decreased by 50% and the number of men increased by 40%.

1. What was the ratio of the number of adults to children visiting the tourist attraction on Saturday?
2. On Friday, 342 women and men visited the tourist attraction. What was the total number of adult visitors at the tourist attraction on Saturday?

	Children	Women	Men
Before	5 u	4 u	5 u
Change		- 2 u	+ 2 u
After	5 u	2 u	7 u

(a)
Increase in the number of women
= 50% x 4 u
= ⁵⁰₁₀₀ x 4 u
= 2 u

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

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

Number of men on Saturday
= 5 u + 2 u
= 7 u

Number of adults on Saturday
= 2 u + 7 u
= 9 u

On Saturday
Adults : Children
9 : 5

(b)
Number of women and men on Friday
= 4 u + 5 u
= 9 u

9 u = 342

1 u = 342 ÷ 9 = 38

Total number of adult visitors on Saturday
= 9 u
= 9 x 38
= 342

Answer(s): (a) 9 : 5; (b) 342