Fill in the blanks.
The ratio of children to adults is 3 : 10.
The ratio of men to women is 2 : 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 |
3x13 = 39 u |
10x13 = 130 u |
|
Men |
Women |
13 |
2x10 |
11x10 |
39 u |
20 u |
110 u |
(a)
Change ratio into units.
Men : Women : Children
2 : 11 : 2 + 11
2 : 11 : 13
The number of adults is the repeated identity.
LCM of 10 and 13 is 130.
Number of children = 39 u
(b)
Number of men = 20 u
(c)
Difference in the number of women and men
= 110 u - 20 u
= 90 u
(d)
Total number of people
= 39 u + 130 u
= 169 u
Answer(s): (a) 39; (b) 20; (c) 90; (d) 169