Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 3 : 2.
The ratio of girls to boys is 4 : 1.
The number of men to women is 3 : 2.
Let the number of children be 2 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Difference between the number of girls and women = _____ u
Adults |
Children |
3 u |
2 u |
Men |
Women |
Girls |
Boys |
3 |
2 |
4 |
1 |
|
25 x 3 u = 1.2 u |
45 x 2 u = 1.6 u |
|
(a)
Change ratio into units.
Number of adults = 3 u
(b)
Number of children = 2 u
Girls : Boys : Children
4 : 1 : 4 + 1
4 : 1 : 5
Fraction of the children that were girls =
45 Number of girls
=
45 x 2 u
= 1.6 u
(c)
Number of adults = 3 u
Fraction of the adults that were women =
25 Number of women
=
25 x 3 u
= 1.2 u
(d)
Difference between the number of girls and women
= 1.6 u - 1.2 u
= 0.4 u
Answer(s): (a) 3; (b) 1.6; (c) 1.2; (d) 0.4