Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 5 : 7.
The ratio of girls to boys is 1 : 2.
The number of men to women is 2 : 5.
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 |
5 u |
7 u |
Men |
Women |
Girls |
Boys |
2 |
5 |
1 |
2 |
|
57 x 5 u = 347 u |
13 x 7 u = 213 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
1 : 2 : 1 + 2
1 : 2 : 3
Number of adults = 5 u
(b)
Number of children = 7 u
Fraction of the children that were girls =
13 Number of girls
=
13 x 7 u
= 2
13 u
(c)
Number of adults = 5 u
Fraction of the adults that were women =
57 Number of women
=
57 x 5 u
= 3
47 u
(d)
Total number of people
= 5 u + 7 u
= 12 u
Answer(s): (a) 5; (b) 2
13; (c) 3
47; (d) 12