Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 7 : 6.
The ratio of boys to girls is 3 : 2.
The number of women to men is 4 : 1.
Let the number of children be 6 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Difference between the number of boys and men = _____ u
Adults |
Children |
7 u |
6 u |
Women |
Men |
Boys |
Girls |
4 |
1 |
3 |
2 |
|
15 x 7 u = 1.4 u |
35 x 6 u = 3.6 u |
|
(a)
Change ratio into units.
Number of adults = 7 u
(b)
Number of children = 6 u
Boys : Girls : Children
3 : 2 : 3 + 2
3 : 2 : 5
Fraction of the children that were boys =
35 Number of boys
=
35 x 6 u
= 3.6 u
(c)
Number of adults = 7 u
Fraction of the adults that were men =
15 Number of men
=
15 x 7 u
= 1.4 u
(d)
Difference between the number of boys and men
= 3.6 u - 1.4 u
= 2.2 u
Answer(s): (a) 7; (b) 3.6; (c) 1.4; (d) 2.2