PSLE On Friday, the number of children to men to women visiting a tourist attraction was 1 : 10 : 4. On Saturday, the number of children visiting the tourist attraction remained the same. However, the number of men decreased by 20% and the number of women increased by 25%.
- What was the ratio of the number of adults to children visiting the tourist attraction on Saturday?
- On Friday, 420 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 |
1 u |
10 u |
4 u |
Change |
|
- 2 u |
+ 1 u |
After |
1 u |
8 u |
5 u |
(a)
Increase in the number of men
= 20% x 10 u
=
20100 x 10 u
= 2 u
Decrease in the number of women
= 25% x 4 u
=
25100 x 4 u
= 1 u
Number of men on Saturday
= 10 u - 2 u
= 8 u
Number of women on Saturday
= 4 u + 1 u
= 5 u
Number of adults on Saturday
= 8 u + 5 u
= 13 u
On Saturday
Adults : Children
13 : 1
(b)
Number of men and women on Friday
= 10 u + 4 u
= 14 u
14 u = 420
1 u = 420 ÷ 14 = 30
Total number of adult visitors on Saturday
= 13 u
= 13 x 30
= 390
Answer(s): (a) 13 : 1; (b) 390