Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 3.
The ratio of girls to boys is 5 : 2.
The number of men to women is 1 : 2.
Let the number of children be 3 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
3 u |
Men |
Women |
Girls |
Boys |
1 |
2 |
5 |
2 |
|
23 x 1 u = 23 u |
57 x 3 u = 217 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
5 : 2 : 5 + 2
5 : 2 : 7
Number of adults = 1 u
(b)
Number of children = 3 u
Fraction of the children that were girls =
57 Number of girls
=
57 x 3 u
= 2
17 u
(c)
Number of adults = 1 u
Fraction of the adults that were women =
23 Number of women
=
23 x 1 u
=
23 u
(d)
Total number of people
= 1 u + 3 u
= 4 u
Answer(s): (a) 1; (b) 2
17; (c)
23; (d) 4