PSLE
On Friday, the number of children to women to men visiting a theme park was 7 : 10 : 6. On Saturday, the number of children visiting the theme 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 theme park on Saturday?
2. On Friday, 560 women and men visited the theme park. What was the total number of adult visitors at the theme park on Saturday?

	Children	Women	Men
Before	7 u	10 u	6 u
Change		- 5 u	+ 3 u
After	7 u	5 u	9 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 6 u
= ⁵⁰₁₀₀ x 6 u
= 3 u

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

Number of men on Saturday
= 6 u + 3 u
= 9 u

Number of adults on Saturday
= 5 u + 9 u
= 14 u

On Saturday
Adults : Children
14 : 7

(b)
Number of women and men on Friday
= 10 u + 6 u
= 16 u

16 u = 560

1 u = 560 ÷ 16 = 35

Total number of adult visitors on Saturday
= 14 u
= 14 x 35
= 490

Answer(s): (a) 14 : 7; (b) 490