In a school, there is a total of 750 people.
40% are children.
The rest are adults.
The number of men and women is in the ratio of 1 : 9.
- What percentage of the people are men?
- How many women are there?
Children |
Adults |
Total |
2x10 |
3x10 |
5x10 |
|
Men |
Women |
|
|
1x3 |
9x3 |
|
20 u |
3 u |
27 u |
50 u |
(a)
40% =
40100 =
25 Children : Adults
2 : 5 - 2
2 : 3
Men : Women : Adults
1 : 9 : 10
The number of adults is the combined repeated identity.
Make the number of adults the same using the LCM of 3 and 10.
LCM of 3 and 10 = 30
Percentage of the people that are men
=
350 x 100%
= 6%
(b)
Total number of people = 50 u
50 u = 750
1 u = 750 ÷ 50 = 15
Number of women
= 27 u
= 27 x 15
= 405
Answer(s): (a) 6%; (b) 405