Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 1 : 9.
The ratio of girls to boys is 3 : 7.
The number of men to women is 2 : 3.
Let the number of children be 9 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Difference between the number of girls and women = _____ u
Adults |
Children |
1 u |
9 u |
Men |
Women |
Girls |
Boys |
2 |
3 |
3 |
7 |
|
35 x 1 u = 0.6 u |
310 x 9 u = 2.7 u |
|
(a)
Change ratio into units.
Number of adults = 1 u
(b)
Number of children = 9 u
Girls : Boys : Children
3 : 7 : 3 + 7
3 : 7 : 10
Fraction of the children that were girls =
310 Number of girls
=
310 x 9 u
= 2.7 u
(c)
Number of adults = 1 u
Fraction of the adults that were women =
35 Number of women
=
35 x 1 u
= 0.6 u
(d)
Difference between the number of girls and women
= 2.7 u - 0.6 u
= 2.1 u
Answer(s): (a) 1; (b) 2.7; (c) 0.6; (d) 2.1