Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 7 : 11.
The ratio of boys to girls is 2 : 3.
The number of women to men is 4 : 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 |
7 u |
11 u |
Women |
Men |
Boys |
Girls |
4 |
3 |
2 |
3 |
|
37 x 7 u = 3 u |
25 x 11 u = 4.4 u |
|
(a)
Change ratio into units.
Number of adults = 7 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 = 7 u
Fraction of the adults that were men =
37 Number of men
=
37 x 7 u
= 3 u
(d)
Difference between the number of boys and men
= 4.4 u - 3 u
= 1.4 u
Answer(s): (a) 7; (b) 4.4; (c) 3; (d) 1.4