Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 3 : 2.
The ratio of girls to boys is 4 : 1.
The number of women to men is 2 : 1.
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 |
3 u |
2 u |
Women |
Men |
Girls |
Boys |
2 |
1 |
4 |
1 |
|
13 x 3 u = 1 u |
45 x 2 u = 135 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
4 : 1 : 4 + 1
4 : 1 : 5
Number of adults = 3 u
(b)
Number of children = 2 u
Fraction of the children that were girls =
45 Number of girls
=
45 x 2 u
= 1
35 u
(c)
Number of adults = 3 u
Fraction of the adults that were men =
13 Number of men
=
13 x 3 u
= 1 u
(d)
Total number of people
= 3 u + 2 u
= 5 u
Answer(s): (a) 3; (b) 1
35; (c) 1; (d) 5