Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 1 : 6.
The ratio of boys to girls is 1 : 9.
The number of women to men is 9 : 11.
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 |
1 u |
6 u |
Women |
Men |
Boys |
Girls |
9 |
11 |
1 |
9 |
|
1120 x 1 u = 0.55 u |
110 x 6 u = 0.6 u |
|
(a)
Change ratio into units.
Number of adults = 1 u
(b)
Number of children = 6 u
Boys : Girls : Children
1 : 9 : 1 + 9
1 : 9 : 10
Fraction of the children that were boys =
110 Number of boys
=
110 x 6 u
= 0.6 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
1120 Number of men
=
1120 x 1 u
= 0.55 u
(d)
Difference between the number of boys and men
= 0.6 u - 0.55 u
= 0.05 u
Answer(s): (a) 1; (b) 0.6; (c) 0.55; (d) 0.05