Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 8 : 3.
The ratio of girls to boys is 4 : 3.
The number of women to men is 4 : 3.
Let the number of children be 3 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
8 u |
3 u |
Women |
Men |
Girls |
Boys |
4 |
3 |
4 |
3 |
|
37 x 8 u = 337 u |
47 x 3 u = 157 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
4 : 3 : 4 + 3
4 : 3 : 7
Number of adults = 8 u
(b)
Number of children = 3 u
Fraction of the children that were girls =
47 Number of girls
=
47 x 3 u
= 1
57 u
(c)
Number of adults = 8 u
Fraction of the adults that were men =
37 Number of men
=
37 x 8 u
= 3
37 u
(d)
Total number of people
= 8 u + 3 u
= 11 u
Answer(s): (a) 8; (b) 1
57; (c) 3
37; (d) 11