Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 7 : 11.
The ratio of girls to boys is 1 : 3.
The number of men to women is 5 : 2.
Let the number of children be 11 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Difference between the number of girls and women = _____ u
Adults |
Children |
7 u |
11 u |
Men |
Women |
Girls |
Boys |
5 |
2 |
1 |
3 |
|
27 x 7 u = 2 u |
14 x 11 u = 2.75 u |
|
(a)
Change ratio into units.
Number of adults = 7 u
(b)
Number of children = 11 u
Girls : Boys : Children
1 : 3 : 1 + 3
1 : 3 : 4
Fraction of the children that were girls =
14 Number of girls
=
14 x 11 u
= 2.75 u
(c)
Number of adults = 7 u
Fraction of the adults that were women =
27 Number of women
=
27 x 7 u
= 2 u
(d)
Difference between the number of girls and women
= 2.75 u - 2 u
= 0.75 u
Answer(s): (a) 7; (b) 2.75; (c) 2; (d) 0.75