Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 6 : 5.
The ratio of girls to boys is 3 : 1.
The number of men to women is 5 : 7.
Let the number of children be 5 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Difference between the number of girls and women = _____ u
Adults |
Children |
6 u |
5 u |
Men |
Women |
Girls |
Boys |
5 |
7 |
3 |
1 |
|
712 x 6 u = 3.5 u |
34 x 5 u = 3.75 u |
|
(a)
Change ratio into units.
Number of adults = 6 u
(b)
Number of children = 5 u
Girls : Boys : Children
3 : 1 : 3 + 1
3 : 1 : 4
Fraction of the children that were girls =
34 Number of girls
=
34 x 5 u
= 3.75 u
(c)
Number of adults = 6 u
Fraction of the adults that were women =
712 Number of women
=
712 x 6 u
= 3.5 u
(d)
Difference between the number of girls and women
= 3.75 u - 3.5 u
= 0.25 u
Answer(s): (a) 6; (b) 3.75; (c) 3.5; (d) 0.25