Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 9.
The ratio of girls to boys is 1 : 1.
The number of men to women is 1 : 3.
Let the number of children be 9 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
9 u |
Men |
Women |
Girls |
Boys |
1 |
3 |
1 |
1 |
|
34 x 1 u = 34 u |
12 x 9 u = 412 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
1 : 1 : 1 + 1
1 : 1 : 2
Number of adults = 1 u
(b)
Number of children = 9 u
Fraction of the children that were girls =
12 Number of girls
=
12 x 9 u
= 4
12 u
(c)
Number of adults = 1 u
Fraction of the adults that were women =
34 Number of women
=
34 x 1 u
=
34 u
(d)
Total number of people
= 1 u + 9 u
= 10 u
Answer(s): (a) 1; (b) 4
12; (c)
34; (d) 10