Fill in the blanks.
The ratio of children to adults is 2 : 5.
The ratio of women to men is 9 : 11.
Use LCM and find the following.
- Number of children = _____ u
- Number of women = _____ u
- Difference in the number of men and women = _____ u
- Total number of people = _____ u
Children |
Adults |
2x4 = 8 u |
5x4 = 20 u |
|
Women |
Men |
20 |
9x1 |
11x1 |
8 u |
9 u |
11 u |
(a)
Change ratio into units.
Women : Men : Children
9 : 11 : 9 + 11
9 : 11 : 20
The number of adults is the repeated identity.
LCM of 5 and 20 is 20.
Number of children = 8 u
(b)
Number of women = 9 u
(c)
Difference in the number of men and women
= 11 u - 9 u
= 2 u
(d)
Total number of people
= 8 u + 20 u
= 28 u
Answer(s): (a) 8; (b) 9; (c) 2; (d) 28