Fill in the blanks.
The ratio of children to adults is 1 : 3.
The ratio of women to men is 7 : 8.
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 |
1x5 = 5 u |
3x5 = 15 u |
|
Women |
Men |
15 |
7x1 |
8x1 |
5 u |
7 u |
8 u |
(a)
Change ratio into units.
Women : Men : Children
7 : 8 : 7 + 8
7 : 8 : 15
The number of adults is the repeated identity.
LCM of 3 and 15 is 15.
Number of children = 5 u
(b)
Number of women = 7 u
(c)
Difference in the number of men and women
= 8 u - 7 u
= 1 u
(d)
Total number of people
= 5 u + 15 u
= 20 u
Answer(s): (a) 5; (b) 7; (c) 1; (d) 20