PSLE
On Saturday, the number of children to women to men visiting a park was 5 : 10 : 12. On Sunday, the number of children visiting the park remained the same. However, the number of women decreased by 50% and the number of men increased by 50%.

1. What was the ratio of the number of adults to children visiting the park on Sunday?
2. On Saturday, 704 women and men visited the park. What was the total number of adult visitors at the park on Sunday?

	Children	Women	Men
Before	5 u	10 u	12 u
Change		- 5 u	+ 6 u
After	5 u	5 u	18 u

(a)
Increase in the number of women
= 50% x 10 u
= ⁵⁰₁₀₀ x 10 u
= 5 u

Decrease in the number of men
= 50% x 12 u
= ⁵⁰₁₀₀ x 12 u
= 6 u

Number of women on Sunday
= 10 u - 5 u
= 5 u

Number of men on Sunday
= 12 u + 6 u
= 18 u

Number of adults on Sunday
= 5 u + 18 u
= 23 u

On Sunday
Adults : Children
23 : 5

(b)
Number of women and men on Saturday
= 10 u + 12 u
= 22 u

22 u = 704

1 u = 704 ÷ 22 = 32

Total number of adult visitors on Sunday
= 23 u
= 23 x 32
= 736

Answer(s): (a) 23 : 5; (b) 736