Fill in the blanks.
The ratio of children to adults is 9 : 5.
The ratio of men to women is 2 : 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 |
9x9 = 81 u |
5x9 = 45 u |
|
Men |
Women |
9 |
2x5 |
7x5 |
81 u |
10 u |
35 u |
(a)
Change ratio into units.
Men : Women : Children
2 : 7 : 2 + 7
2 : 7 : 9
The number of adults is the repeated identity.
LCM of 5 and 9 is 45.
Number of children = 81 u
(b)
Number of men = 10 u
(c)
Difference in the number of women and men
= 35 u - 10 u
= 25 u
(d)
Total number of people
= 81 u + 45 u
= 126 u
Answer(s): (a) 81; (b) 10; (c) 25; (d) 126