Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 3 : 1.
The ratio of girls to boys is 6 : 1.
The number of women to men is 4 : 1.
Let the number of children be 1 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
3 u |
1 u |
Women |
Men |
Girls |
Boys |
4 |
1 |
6 |
1 |
|
15 x 3 u = 35 u |
67 x 1 u = 67 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
6 : 1 : 6 + 1
6 : 1 : 7
Number of adults = 3 u
(b)
Number of children = 1 u
Fraction of the children that were girls =
67 Number of girls
=
67 x 1 u
=
67 u
(c)
Number of adults = 3 u
Fraction of the adults that were men =
15 Number of men
=
15 x 3 u
=
35 u
(d)
Total number of people
= 3 u + 1 u
= 4 u
Answer(s): (a) 3; (b)
67; (c)
35; (d) 4