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 3 : 2.
The number of women to men is 2 : 5.
Let the number of children be 9 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
9 u |
Women |
Men |
Girls |
Boys |
2 |
5 |
3 |
2 |
|
57 x 1 u = 57 u |
35 x 9 u = 525 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
3 : 2 : 3 + 2
3 : 2 : 5
Number of adults = 1 u
(b)
Number of children = 9 u
Fraction of the children that were girls =
35 Number of girls
=
35 x 9 u
= 5
25 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
57 Number of men
=
57 x 1 u
=
57 u
(d)
Total number of people
= 1 u + 9 u
= 10 u
Answer(s): (a) 1; (b) 5
25; (c)
57; (d) 10