Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 3 : 8.
The ratio of girls to boys is 2 : 3.
The number of women to men is 1 : 2.
Let the number of children be 8 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Difference between the number of girls and men = _____ u
Adults |
Children |
3 u |
8 u |
Women |
Men |
Girls |
Boys |
1 |
2 |
2 |
3 |
|
23 x 3 u = 2 u |
25 x 8 u = 3.2 u |
|
(a)
Change ratio into units.
Number of adults = 3 u
(b)
Number of children = 8 u
Girls : Boys : Children
2 : 3 : 2 + 3
2 : 3 : 5
Fraction of the children that were girls =
25 Number of girls
=
25 x 8 u
= 3.2 u
(c)
Number of adults = 3 u
Fraction of the adults that were men =
23 Number of men
=
23 x 3 u
= 2 u
(d)
Difference between the number of girls and men
= 3.2 u - 2 u
= 1.2 u
Answer(s): (a) 3; (b) 3.2; (c) 2; (d) 1.2