Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 2 : 3.
The ratio of girls to boys is 3 : 2.
The number of women to men is 9 : 11.
Let the number of children be 3 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Difference between the number of girls and men = _____ u
Adults |
Children |
2 u |
3 u |
Women |
Men |
Girls |
Boys |
9 |
11 |
3 |
2 |
|
1120 x 2 u = 1.1 u |
35 x 3 u = 1.8 u |
|
(a)
Change ratio into units.
Number of adults = 2 u
(b)
Number of children = 3 u
Girls : Boys : Children
3 : 2 : 3 + 2
3 : 2 : 5
Fraction of the children that were girls =
35 Number of girls
=
35 x 3 u
= 1.8 u
(c)
Number of adults = 2 u
Fraction of the adults that were men =
1120 Number of men
=
1120 x 2 u
= 1.1 u
(d)
Difference between the number of girls and men
= 1.8 u - 1.1 u
= 0.7 u
Answer(s): (a) 2; (b) 1.8; (c) 1.1; (d) 0.7