Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 8 : 7.
The ratio of girls to boys is 2 : 5.
The number of men to women is 3 : 1.
Let the number of children be 7 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
8 u |
7 u |
Men |
Women |
Girls |
Boys |
3 |
1 |
2 |
5 |
|
14 x 8 u = 2 u |
27 x 7 u = 2 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
2 : 5 : 2 + 5
2 : 5 : 7
Number of adults = 8 u
(b)
Number of children = 7 u
Fraction of the children that were girls =
27 Number of girls
=
27 x 7 u
= 2 u
(c)
Number of adults = 8 u
Fraction of the adults that were women =
14 Number of women
=
14 x 8 u
= 2 u
(d)
Total number of people
= 8 u + 7 u
= 15 u
Answer(s): (a) 8; (b) 2; (c) 2; (d) 15