Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 2 : 11.
The ratio of girls to boys is 7 : 3.
The number of women to men is 3 : 2.
Let the number of children be 11 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 |
11 u |
Women |
Men |
Girls |
Boys |
3 |
2 |
7 |
3 |
|
25 x 2 u = 0.8 u |
710 x 11 u = 7.7 u |
|
(a)
Change ratio into units.
Number of adults = 2 u
(b)
Number of children = 11 u
Girls : Boys : Children
7 : 3 : 7 + 3
7 : 3 : 10
Fraction of the children that were girls =
710 Number of girls
=
710 x 11 u
= 7.7 u
(c)
Number of adults = 2 u
Fraction of the adults that were men =
25 Number of men
=
25 x 2 u
= 0.8 u
(d)
Difference between the number of girls and men
= 7.7 u - 0.8 u
= 6.9 u
Answer(s): (a) 2; (b) 7.7; (c) 0.8; (d) 6.9