Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 2.
The ratio of girls to boys is 3 : 4.
The number of women to men is 5 : 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 |
1 u |
2 u |
Women |
Men |
Girls |
Boys |
5 |
2 |
3 |
4 |
|
27 x 1 u = 27 u |
37 x 2 u = 67 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
3 : 4 : 3 + 4
3 : 4 : 7
Number of adults = 1 u
(b)
Number of children = 2 u
Fraction of the children that were girls =
37 Number of girls
=
37 x 2 u
=
67 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
27 Number of men
=
27 x 1 u
=
27 u
(d)
Total number of people
= 1 u + 2 u
= 3 u
Answer(s): (a) 1; (b)
67; (c)
27; (d) 3