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 8 : 7.
The number of men to women is 3 : 1.
Let the number of children be 3 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Difference between the number of girls and women = _____ u
Adults |
Children |
1 u |
3 u |
Men |
Women |
Girls |
Boys |
3 |
1 |
8 |
7 |
|
14 x 1 u = 0.25 u |
815 x 3 u = 1.6 u |
|
(a)
Change ratio into units.
Number of adults = 1 u
(b)
Number of children = 3 u
Girls : Boys : Children
8 : 7 : 8 + 7
8 : 7 : 15
Fraction of the children that were girls =
815 Number of girls
=
815 x 3 u
= 1.6 u
(c)
Number of adults = 1 u
Fraction of the adults that were women =
14 Number of women
=
14 x 1 u
= 0.25 u
(d)
Difference between the number of girls and women
= 1.6 u - 0.25 u
= 1.35 u
Answer(s): (a) 1; (b) 1.6; (c) 0.25; (d) 1.35