Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 1 : 8.
The ratio of girls to boys is 7 : 3.
The number of women to men is 3 : 1.
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 |
1 u |
8 u |
Women |
Men |
Girls |
Boys |
3 |
1 |
7 |
3 |
|
14 x 1 u = 0.25 u |
710 x 8 u = 5.6 u |
|
(a)
Change ratio into units.
Number of adults = 1 u
(b)
Number of children = 8 u
Girls : Boys : Children
7 : 3 : 7 + 3
7 : 3 : 10
Fraction of the children that were girls =
710 Number of girls
=
710 x 8 u
= 5.6 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
14 Number of men
=
14 x 1 u
= 0.25 u
(d)
Difference between the number of girls and men
= 5.6 u - 0.25 u
= 5.35 u
Answer(s): (a) 1; (b) 5.6; (c) 0.25; (d) 5.35