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 1 : 1.
The number of men to women is 9 : 11.
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 |
9 |
11 |
1 |
1 |
|
1120 x 9 u = 4.95 u |
12 x 11 u = 5.5 u |
|
(a)
Change ratio into units.
Number of adults = 9 u
(b)
Number of children = 11 u
Boys : Girls : Children
1 : 1 : 1 + 1
1 : 1 : 2
Fraction of the children that were boys =
12 Number of boys
=
12 x 11 u
= 5.5 u
(c)
Number of adults = 9 u
Fraction of the adults that were women =
1120 Number of women
=
1120 x 9 u
= 4.95 u
(d)
Difference between the number of boys and women
= 5.5 u - 4.95 u
= 0.55 u
Answer(s): (a) 9; (b) 5.5; (c) 4.95; (d) 0.55