Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 1 : 3.
The ratio of girls to boys is 1 : 1.
The number of women to men is 3 : 2.
Let the number of children be 3 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Difference between the number of girls and men = _____ u
Adults |
Children |
1 u |
3 u |
Women |
Men |
Girls |
Boys |
3 |
2 |
1 |
1 |
|
25 x 1 u = 0.4 u |
12 x 3 u = 1.5 u |
|
(a)
Change ratio into units.
Number of adults = 1 u
(b)
Number of children = 3 u
Girls : Boys : Children
1 : 1 : 1 + 1
1 : 1 : 2
Fraction of the children that were girls =
12 Number of girls
=
12 x 3 u
= 1.5 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
25 Number of men
=
25 x 1 u
= 0.4 u
(d)
Difference between the number of girls and men
= 1.5 u - 0.4 u
= 1.1 u
Answer(s): (a) 1; (b) 1.5; (c) 0.4; (d) 1.1