Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 7 : 4.
The ratio of girls to boys is 3 : 2.
The number of men to women is 4 : 1.
Let the number of children be 4 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Difference between the number of girls and women = _____ u
Adults |
Children |
7 u |
4 u |
Men |
Women |
Girls |
Boys |
4 |
1 |
3 |
2 |
|
15 x 7 u = 1.4 u |
35 x 4 u = 2.4 u |
|
(a)
Change ratio into units.
Number of adults = 7 u
(b)
Number of children = 4 u
Girls : Boys : Children
3 : 2 : 3 + 2
3 : 2 : 5
Fraction of the children that were girls =
35 Number of girls
=
35 x 4 u
= 2.4 u
(c)
Number of adults = 7 u
Fraction of the adults that were women =
15 Number of women
=
15 x 7 u
= 1.4 u
(d)
Difference between the number of girls and women
= 2.4 u - 1.4 u
= 1 u
Answer(s): (a) 7; (b) 2.4; (c) 1.4; (d) 1