Fill in the blanks.
The ratio of children to adults is 9 : 10.
The ratio of men to women is 3 : 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 |
9x1 = 9 u |
10x1 = 10 u |
|
Men |
Women |
10 |
3x1 |
7x1 |
9 u |
3 u |
7 u |
(a)
Change ratio into units.
Men : Women : Children
3 : 7 : 3 + 7
3 : 7 : 10
The number of adults is the repeated identity.
LCM of 10 and 10 is 10.
Number of children = 9 u
(b)
Number of men = 3 u
(c)
Difference in the number of women and men
= 7 u - 3 u
= 4 u
(d)
Total number of people
= 9 u + 10 u
= 19 u
Answer(s): (a) 9; (b) 3; (c) 4; (d) 19