PSLE
On Saturday, the number of children to women to men visiting a tourist attraction was 5 : 12 : 8. On Sunday, the number of children visiting the tourist attraction remained the same. However, the number of women decreased by 25% and the number of men increased by 25%.

1. What was the ratio of the number of adults to children visiting the tourist attraction on Sunday?
2. On Saturday, 1000 women and men visited the tourist attraction. What was the total number of adult visitors at the tourist attraction on Sunday?

	Children	Women	Men
Before	5 u	12 u	8 u
Change		- 3 u	+ 2 u
After	5 u	9 u	10 u

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

Decrease in the number of men
= 25% x 8 u
= ²⁵₁₀₀ x 8 u
= 2 u

Number of women on Sunday
= 12 u - 3 u
= 9 u

Number of men on Sunday
= 8 u + 2 u
= 10 u

Number of adults on Sunday
= 9 u + 10 u
= 19 u

On Sunday
Adults : Children
19 : 5

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

20 u = 1000

1 u = 1000 ÷ 20 = 50

Total number of adult visitors on Sunday
= 19 u
= 19 x 50
= 950

Answer(s): (a) 19 : 5; (b) 950