Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 4 : 9.
The ratio of girls to boys is 3 : 2.
The number of women to men is 3 : 2.
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 |
4 u |
9 u |
Women |
Men |
Girls |
Boys |
3 |
2 |
3 |
2 |
|
25 x 4 u = 1.6 u |
35 x 9 u = 5.4 u |
|
(a)
Change ratio into units.
Number of adults = 4 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 = 4 u
Fraction of the adults that were men =
25 Number of men
=
25 x 4 u
= 1.6 u
(d)
Difference between the number of girls and men
= 5.4 u - 1.6 u
= 3.8 u
Answer(s): (a) 4; (b) 5.4; (c) 1.6; (d) 3.8