Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 4 : 3.
The ratio of girls to boys is 1 : 5.
The number of women to men is 3 : 1.
Let the number of children be 3 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
4 u |
3 u |
Women |
Men |
Girls |
Boys |
3 |
1 |
1 |
5 |
|
14 x 4 u = 1 u |
16 x 3 u = 12 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
1 : 5 : 1 + 5
1 : 5 : 6
Number of adults = 4 u
(b)
Number of children = 3 u
Fraction of the children that were girls =
16 Number of girls
=
16 x 3 u
=
12 u
(c)
Number of adults = 4 u
Fraction of the adults that were men =
14 Number of men
=
14 x 4 u
= 1 u
(d)
Total number of people
= 4 u + 3 u
= 7 u
Answer(s): (a) 4; (b)
12; (c) 1; (d) 7