Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 9 : 4.
The ratio of girls to boys is 2 : 1.
The number of women to men is 3 : 1.
Let the number of children be 4 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
9 u |
4 u |
Women |
Men |
Girls |
Boys |
3 |
1 |
2 |
1 |
|
14 x 9 u = 214 u |
23 x 4 u = 223 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
2 : 1 : 2 + 1
2 : 1 : 3
Number of adults = 9 u
(b)
Number of children = 4 u
Fraction of the children that were girls =
23 Number of girls
=
23 x 4 u
= 2
23 u
(c)
Number of adults = 9 u
Fraction of the adults that were men =
14 Number of men
=
14 x 9 u
= 2
14 u
(d)
Total number of people
= 9 u + 4 u
= 13 u
Answer(s): (a) 9; (b) 2
23; (c) 2
14; (d) 13