Fill in the blanks.
The ratio of children to adults is 7 : 9.
The ratio of men to women is 4 : 9.
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 |
7x13 = 91 u |
9x13 = 117 u |
|
Men |
Women |
13 |
4x9 |
9x9 |
91 u |
36 u |
81 u |
(a)
Change ratio into units.
Men : Women : Children
4 : 9 : 4 + 9
4 : 9 : 13
The number of adults is the repeated identity.
LCM of 9 and 13 is 117.
Number of children = 91 u
(b)
Number of men = 36 u
(c)
Difference in the number of women and men
= 81 u - 36 u
= 45 u
(d)
Total number of people
= 91 u + 117 u
= 208 u
Answer(s): (a) 91; (b) 36; (c) 45; (d) 208