Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 2 : 9.
The ratio of girls to boys is 3 : 2.
The number of women to men is 3 : 1.
Let the number of children be 9 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 |
9 u |
Women |
Men |
Girls |
Boys |
3 |
1 |
3 |
2 |
|
14 x 2 u = 0.5 u |
35 x 9 u = 5.4 u |
|
(a)
Change ratio into units.
Number of adults = 2 u
(b)
Number of children = 9 u
Girls : Boys : Children
3 : 2 : 3 + 2
3 : 2 : 5
Fraction of the children that were girls =
35 Number of girls
=
35 x 9 u
= 5.4 u
(c)
Number of adults = 2 u
Fraction of the adults that were men =
14 Number of men
=
14 x 2 u
= 0.5 u
(d)
Difference between the number of girls and men
= 5.4 u - 0.5 u
= 4.9 u
Answer(s): (a) 2; (b) 5.4; (c) 0.5; (d) 4.9