Fill in the blanks.
The ratio of children to adults is 8 : 11.
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 |
8x15 = 120 u |
11x15 = 165 u |
|
Men |
Women |
15 |
7x11 |
8x11 |
120 u |
77 u |
88 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 11 and 15 is 165.
Number of children = 120 u
(b)
Number of men = 77 u
(c)
Difference in the number of women and men
= 88 u - 77 u
= 11 u
(d)
Total number of people
= 120 u + 165 u
= 285 u
Answer(s): (a) 120; (b) 77; (c) 11; (d) 285