Fill in the blanks.
The ratio of children to adults is 2 : 3.
The ratio of men to women is 7 : 9.
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 |
2x16 = 32 u |
3x16 = 48 u |
|
Men |
Women |
16 |
7x3 |
9x3 |
32 u |
21 u |
27 u |
(a)
Change ratio into units.
Men : Women : Children
7 : 9 : 7 + 9
7 : 9 : 16
The number of adults is the repeated identity.
LCM of 3 and 16 is 48.
Number of children = 32 u
(b)
Number of men = 21 u
(c)
Difference in the number of women and men
= 27 u - 21 u
= 6 u
(d)
Total number of people
= 32 u + 48 u
= 80 u
Answer(s): (a) 32; (b) 21; (c) 6; (d) 80