Fill in the blanks.
The ratio of children to adults is 9 : 5.
The ratio of men to women is 7 : 11.
Use LCM and find the following.
- Number of children = _____ u
- Number of men = _____ u
- Difference in the number of women and men = _____ u
- Total number of people = _____ u
Children |
Adults |
9x18 = 162 u |
5x18 = 90 u |
|
Men |
Women |
18 |
7x5 |
11x5 |
162 u |
35 u |
55 u |
(a)
Change ratio into units.
Men : Women : Children
7 : 11 : 7 + 11
7 : 11 : 18
The number of adults is the repeated identity.
LCM of 5 and 18 is 90.
Number of children = 162 u
(b)
Number of men = 35 u
(c)
Difference in the number of women and men
= 55 u - 35 u
= 20 u
(d)
Total number of people
= 162 u + 90 u
= 252 u
Answer(s): (a) 162; (b) 35; (c) 20; (d) 252