Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 4 : 11.
The ratio of girls to boys is 2 : 5.
The number of women to men is 3 : 4.
Let the number of children be 11 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
4 u |
11 u |
Women |
Men |
Girls |
Boys |
3 |
4 |
2 |
5 |
|
47 x 4 u = 227 u |
27 x 11 u = 317 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
2 : 5 : 2 + 5
2 : 5 : 7
Number of adults = 4 u
(b)
Number of children = 11 u
Fraction of the children that were girls =
27 Number of girls
=
27 x 11 u
= 3
17 u
(c)
Number of adults = 4 u
Fraction of the adults that were men =
47 Number of men
=
47 x 4 u
= 2
27 u
(d)
Total number of people
= 4 u + 11 u
= 15 u
Answer(s): (a) 4; (b) 3
17; (c) 2
27; (d) 15