Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 9 : 2.
The ratio of girls to boys is 1 : 3.
The number of women to men is 1 : 2.
Let the number of children be 2 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
9 u |
2 u |
Women |
Men |
Girls |
Boys |
1 |
2 |
1 |
3 |
|
23 x 9 u = 6 u |
14 x 2 u = 12 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
1 : 3 : 1 + 3
1 : 3 : 4
Number of adults = 9 u
(b)
Number of children = 2 u
Fraction of the children that were girls =
14 Number of girls
=
14 x 2 u
=
12 u
(c)
Number of adults = 9 u
Fraction of the adults that were men =
23 Number of men
=
23 x 9 u
= 6 u
(d)
Total number of people
= 9 u + 2 u
= 11 u
Answer(s): (a) 9; (b)
12; (c) 6; (d) 11