Fill in the blanks.
The ratio of children to adults is 7 : 6.
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 |
7x7 = 49 u |
6x7 = 42 u |
|
Men |
Women |
7 |
2x6 |
5x6 |
49 u |
12 u |
30 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 6 and 7 is 42.
Number of children = 49 u
(b)
Number of men = 12 u
(c)
Difference in the number of women and men
= 30 u - 12 u
= 18 u
(d)
Total number of people
= 49 u + 42 u
= 91 u
Answer(s): (a) 49; (b) 12; (c) 18; (d) 91