Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 1 : 12.
The ratio of girls to boys is 9 : 11.
The number of men to women is 1 : 4.
Let the number of children be 12 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 |
12 u |
Men |
Women |
Girls |
Boys |
1 |
4 |
9 |
11 |
|
45 x 1 u = 0.8 u |
920 x 12 u = 5.4 u |
|
(a)
Change ratio into units.
Number of adults = 1 u
(b)
Number of children = 12 u
Girls : Boys : Children
9 : 11 : 9 + 11
9 : 11 : 20
Fraction of the children that were girls =
920 Number of girls
=
920 x 12 u
= 5.4 u
(c)
Number of adults = 1 u
Fraction of the adults that were women =
45 Number of women
=
45 x 1 u
= 0.8 u
(d)
Difference between the number of girls and women
= 5.4 u - 0.8 u
= 4.6 u
Answer(s): (a) 1; (b) 5.4; (c) 0.8; (d) 4.6