Fill in the blanks.
The ratio of children to adults is 9 : 7.
The ratio of men to women is 2 : 5.
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 |
7x1 = 7 u |
|
Men |
Women |
7 |
2x1 |
5x1 |
9 u |
2 u |
5 u |
(a)
Change ratio into units.
Men : Women : Children
2 : 5 : 2 + 5
2 : 5 : 7
The number of adults is the repeated identity.
LCM of 7 and 7 is 7.
Number of children = 9 u
(b)
Number of men = 2 u
(c)
Difference in the number of women and men
= 5 u - 2 u
= 3 u
(d)
Total number of people
= 9 u + 7 u
= 16 u
Answer(s): (a) 9; (b) 2; (c) 3; (d) 16