Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 3 : 4.
The ratio of girls to boys is 4 : 1.
The number of women to men is 1 : 3.
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 |
3 u |
4 u |
Women |
Men |
Girls |
Boys |
1 |
3 |
4 |
1 |
|
34 x 3 u = 214 u |
45 x 4 u = 315 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 = 4 u
Fraction of the children that were girls =
45 Number of girls
=
45 x 4 u
= 3
15 u
(c)
Number of adults = 3 u
Fraction of the adults that were men =
34 Number of men
=
34 x 3 u
= 2
14 u
(d)
Total number of people
= 3 u + 4 u
= 7 u
Answer(s): (a) 3; (b) 3
15; (c) 2
14; (d) 7