Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 4 : 11.
The ratio of boys to girls is 2 : 3.
The number of women to men is 3 : 2.
Let the number of children be 11 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Difference between the number of boys and men = _____ u
Adults |
Children |
4 u |
11 u |
Women |
Men |
Boys |
Girls |
3 |
2 |
2 |
3 |
|
25 x 4 u = 1.6 u |
25 x 11 u = 4.4 u |
|
(a)
Change ratio into units.
Number of adults = 4 u
(b)
Number of children = 11 u
Boys : Girls : Children
2 : 3 : 2 + 3
2 : 3 : 5
Fraction of the children that were boys =
25 Number of boys
=
25 x 11 u
= 4.4 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 boys and men
= 4.4 u - 1.6 u
= 2.8 u
Answer(s): (a) 4; (b) 4.4; (c) 1.6; (d) 2.8