Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 7 : 8.
The ratio of girls to boys is 2 : 1.
The number of men to women is 3 : 4.
Let the number of children be 8 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
7 u |
8 u |
Men |
Women |
Girls |
Boys |
3 |
4 |
2 |
1 |
|
47 x 7 u = 4 u |
23 x 8 u = 513 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
2 : 1 : 2 + 1
2 : 1 : 3
Number of adults = 7 u
(b)
Number of children = 8 u
Fraction of the children that were girls =
23 Number of girls
=
23 x 8 u
= 5
13 u
(c)
Number of adults = 7 u
Fraction of the adults that were women =
47 Number of women
=
47 x 7 u
= 4 u
(d)
Total number of people
= 7 u + 8 u
= 15 u
Answer(s): (a) 7; (b) 5
13; (c) 4; (d) 15