Fill in the blanks.
The ratio of children to adults is 4 : 3.
The ratio of men to women is 4 : 7.
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 |
4x11 = 44 u |
3x11 = 33 u |
|
Men |
Women |
11 |
4x3 |
7x3 |
44 u |
12 u |
21 u |
(a)
Change ratio into units.
Men : Women : Children
4 : 7 : 4 + 7
4 : 7 : 11
The number of adults is the repeated identity.
LCM of 3 and 11 is 33.
Number of children = 44 u
(b)
Number of men = 12 u
(c)
Difference in the number of women and men
= 21 u - 12 u
= 9 u
(d)
Total number of people
= 44 u + 33 u
= 77 u
Answer(s): (a) 44; (b) 12; (c) 9; (d) 77