Fill in the blanks.
The ratio of children to adults is 1 : 9.
The ratio of women to men is 5 : 7.
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 |
1x4 = 4 u |
9x4 = 36 u |
|
Women |
Men |
12 |
5x3 |
7x3 |
4 u |
15 u |
21 u |
(a)
Change ratio into units.
Women : Men : Children
5 : 7 : 5 + 7
5 : 7 : 12
The number of adults is the repeated identity.
LCM of 9 and 12 is 36.
Number of children = 4 u
(b)
Number of women = 15 u
(c)
Difference in the number of men and women
= 21 u - 15 u
= 6 u
(d)
Total number of people
= 4 u + 36 u
= 40 u
Answer(s): (a) 4; (b) 15; (c) 6; (d) 40