Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 5 : 7.
The ratio of girls to boys is 3 : 11.
The number of women to men is 3 : 1.
Let the number of children be 7 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Difference between the number of girls and men = _____ u
Adults |
Children |
5 u |
7 u |
Women |
Men |
Girls |
Boys |
3 |
1 |
3 |
11 |
|
14 x 5 u = 1.25 u |
314 x 7 u = 1.5 u |
|
(a)
Change ratio into units.
Number of adults = 5 u
(b)
Number of children = 7 u
Girls : Boys : Children
3 : 11 : 3 + 11
3 : 11 : 14
Fraction of the children that were girls =
314 Number of girls
=
314 x 7 u
= 1.5 u
(c)
Number of adults = 5 u
Fraction of the adults that were men =
14 Number of men
=
14 x 5 u
= 1.25 u
(d)
Difference between the number of girls and men
= 1.5 u - 1.25 u
= 0.25 u
Answer(s): (a) 5; (b) 1.5; (c) 1.25; (d) 0.25