Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 9 : 11.
The ratio of boys to girls is 3 : 1.
The number of men to women is 1 : 3.
Let the number of children be 11 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Difference between the number of boys and women = _____ u
Adults |
Children |
9 u |
11 u |
Men |
Women |
Boys |
Girls |
1 |
3 |
3 |
1 |
|
34 x 9 u = 6.75 u |
34 x 11 u = 8.25 u |
|
(a)
Change ratio into units.
Number of adults = 9 u
(b)
Number of children = 11 u
Boys : Girls : Children
3 : 1 : 3 + 1
3 : 1 : 4
Fraction of the children that were boys =
34 Number of boys
=
34 x 11 u
= 8.25 u
(c)
Number of adults = 9 u
Fraction of the adults that were women =
34 Number of women
=
34 x 9 u
= 6.75 u
(d)
Difference between the number of boys and women
= 8.25 u - 6.75 u
= 1.5 u
Answer(s): (a) 9; (b) 8.25; (c) 6.75; (d) 1.5