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 4 : 1.
The number of women to men is 1 : 3.
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 |
1 |
3 |
4 |
1 |
|
34 x 4 u = 3 u |
45 x 11 u = 8.8 u |
|
(a)
Change ratio into units.
Number of adults = 4 u
(b)
Number of children = 11 u
Boys : Girls : Children
4 : 1 : 4 + 1
4 : 1 : 5
Fraction of the children that were boys =
45 Number of boys
=
45 x 11 u
= 8.8 u
(c)
Number of adults = 4 u
Fraction of the adults that were men =
34 Number of men
=
34 x 4 u
= 3 u
(d)
Difference between the number of boys and men
= 8.8 u - 3 u
= 5.8 u
Answer(s): (a) 4; (b) 8.8; (c) 3; (d) 5.8