Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 7 : 8.
The ratio of boys to girls is 3 : 2.
The number of women to men is 9 : 5.
Let the number of children be 8 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 |
8 u |
Women |
Men |
Boys |
Girls |
9 |
5 |
3 |
2 |
|
514 x 7 u = 2.5 u |
35 x 8 u = 4.8 u |
|
(a)
Change ratio into units.
Number of adults = 7 u
(b)
Number of children = 8 u
Boys : Girls : Children
3 : 2 : 3 + 2
3 : 2 : 5
Fraction of the children that were boys =
35 Number of boys
=
35 x 8 u
= 4.8 u
(c)
Number of adults = 7 u
Fraction of the adults that were men =
514 Number of men
=
514 x 7 u
= 2.5 u
(d)
Difference between the number of boys and men
= 4.8 u - 2.5 u
= 2.3 u
Answer(s): (a) 7; (b) 4.8; (c) 2.5; (d) 2.3