Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 2 : 1.
The ratio of girls to boys is 5 : 1.
The number of women to men is 5 : 4.
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 |
2 u |
1 u |
Women |
Men |
Girls |
Boys |
5 |
4 |
5 |
1 |
|
49 x 2 u = 89 u |
56 x 1 u = 56 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
5 : 1 : 5 + 1
5 : 1 : 6
Number of adults = 2 u
(b)
Number of children = 1 u
Fraction of the children that were girls =
56 Number of girls
=
56 x 1 u
=
56 u
(c)
Number of adults = 2 u
Fraction of the adults that were men =
49 Number of men
=
49 x 2 u
=
89 u
(d)
Total number of people
= 2 u + 1 u
= 3 u
Answer(s): (a) 2; (b)
56; (c)
89; (d) 3