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 1 : 2.
The number of women to men is 1 : 5.
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 |
5 |
1 |
2 |
|
56 x 3 u = 212 u |
13 x 4 u = 113 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
1 : 2 : 1 + 2
1 : 2 : 3
Number of adults = 3 u
(b)
Number of children = 4 u
Fraction of the children that were girls =
13 Number of girls
=
13 x 4 u
= 1
13 u
(c)
Number of adults = 3 u
Fraction of the adults that were men =
56 Number of men
=
56 x 3 u
= 2
12 u
(d)
Total number of people
= 3 u + 4 u
= 7 u
Answer(s): (a) 3; (b) 1
13; (c) 2
12; (d) 7