Fill in the blanks.
The ratio of children to adults is 7 : 2.
The ratio of men to women is 7 : 8.
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 |
7x15 = 105 u |
2x15 = 30 u |
|
Men |
Women |
15 |
7x2 |
8x2 |
105 u |
14 u |
16 u |
(a)
Change ratio into units.
Men : Women : Children
7 : 8 : 7 + 8
7 : 8 : 15
The number of adults is the repeated identity.
LCM of 2 and 15 is 30.
Number of children = 105 u
(b)
Number of men = 14 u
(c)
Difference in the number of women and men
= 16 u - 14 u
= 2 u
(d)
Total number of people
= 105 u + 30 u
= 135 u
Answer(s): (a) 105; (b) 14; (c) 2; (d) 135