Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 4 : 7.
The ratio of girls to boys is 9 : 5.
The number of men to women is 2 : 3.
Let the number of children be 7 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Difference between the number of girls and women = _____ u
Adults |
Children |
4 u |
7 u |
Men |
Women |
Girls |
Boys |
2 |
3 |
9 |
5 |
|
35 x 4 u = 2.4 u |
914 x 7 u = 4.5 u |
|
(a)
Change ratio into units.
Number of adults = 4 u
(b)
Number of children = 7 u
Girls : Boys : Children
9 : 5 : 9 + 5
9 : 5 : 14
Fraction of the children that were girls =
914 Number of girls
=
914 x 7 u
= 4.5 u
(c)
Number of adults = 4 u
Fraction of the adults that were women =
35 Number of women
=
35 x 4 u
= 2.4 u
(d)
Difference between the number of girls and women
= 4.5 u - 2.4 u
= 2.1 u
Answer(s): (a) 4; (b) 4.5; (c) 2.4; (d) 2.1