Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 3 : 7.
The ratio of girls to boys is 5 : 2.
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 |
3 u |
7 u |
Women |
Men |
Girls |
Boys |
3 |
5 |
5 |
2 |
|
58 x 3 u = 178 u |
57 x 7 u = 5 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
5 : 2 : 5 + 2
5 : 2 : 7
Number of adults = 3 u
(b)
Number of children = 7 u
Fraction of the children that were girls =
57 Number of girls
=
57 x 7 u
= 5 u
(c)
Number of adults = 3 u
Fraction of the adults that were men =
58 Number of men
=
58 x 3 u
= 1
78 u
(d)
Total number of people
= 3 u + 7 u
= 10 u
Answer(s): (a) 3; (b) 5; (c) 1
78; (d) 10