Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 3 : 7.
The ratio of girls to boys is 1 : 3.
The number of men to women is 7 : 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 |
3 u |
7 u |
Men |
Women |
Girls |
Boys |
7 |
3 |
1 |
3 |
|
310 x 3 u = 0.9 u |
14 x 7 u = 1.75 u |
|
(a)
Change ratio into units.
Number of adults = 3 u
(b)
Number of children = 7 u
Girls : Boys : Children
1 : 3 : 1 + 3
1 : 3 : 4
Fraction of the children that were girls =
14 Number of girls
=
14 x 7 u
= 1.75 u
(c)
Number of adults = 3 u
Fraction of the adults that were women =
310 Number of women
=
310 x 3 u
= 0.9 u
(d)
Difference between the number of girls and women
= 1.75 u - 0.9 u
= 0.85 u
Answer(s): (a) 3; (b) 1.75; (c) 0.9; (d) 0.85