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 2 : 3.
The number of men to women is 7 : 3.
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 |
7 |
3 |
2 |
3 |
|
310 x 7 u = 2.1 u |
25 x 11 u = 4.4 u |
|
(a)
Change ratio into units.
Number of adults = 7 u
(b)
Number of children = 11 u
Girls : Boys : Children
2 : 3 : 2 + 3
2 : 3 : 5
Fraction of the children that were girls =
25 Number of girls
=
25 x 11 u
= 4.4 u
(c)
Number of adults = 7 u
Fraction of the adults that were women =
310 Number of women
=
310 x 7 u
= 2.1 u
(d)
Difference between the number of girls and women
= 4.4 u - 2.1 u
= 2.3 u
Answer(s): (a) 7; (b) 4.4; (c) 2.1; (d) 2.3