Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 9 : 8.
The ratio of girls to boys is 2 : 3.
The number of men to women is 3 : 1.
Let the number of children be 8 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Difference between the number of girls and women = _____ u
Adults |
Children |
9 u |
8 u |
Men |
Women |
Girls |
Boys |
3 |
1 |
2 |
3 |
|
14 x 9 u = 2.25 u |
25 x 8 u = 3.2 u |
|
(a)
Change ratio into units.
Number of adults = 9 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 = 9 u
Fraction of the adults that were women =
14 Number of women
=
14 x 9 u
= 2.25 u
(d)
Difference between the number of girls and women
= 3.2 u - 2.25 u
= 0.95 u
Answer(s): (a) 9; (b) 3.2; (c) 2.25; (d) 0.95