Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 4 : 7.
The ratio of girls to boys is 1 : 4.
The number of women to men is 3 : 5.
Let the number of children be 7 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
4 u |
7 u |
Women |
Men |
Girls |
Boys |
3 |
5 |
1 |
4 |
|
58 x 4 u = 212 u |
15 x 7 u = 125 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
1 : 4 : 1 + 4
1 : 4 : 5
Number of adults = 4 u
(b)
Number of children = 7 u
Fraction of the children that were girls =
15 Number of girls
=
15 x 7 u
= 1
25 u
(c)
Number of adults = 4 u
Fraction of the adults that were men =
58 Number of men
=
58 x 4 u
= 2
12 u
(d)
Total number of people
= 4 u + 7 u
= 11 u
Answer(s): (a) 4; (b) 1
25; (c) 2
12; (d) 11