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 2 : 3.
The number of women to men is 2 : 1.
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 |
1 |
2 |
3 |
|
13 x 1 u = 13 u |
25 x 9 u = 335 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
2 : 3 : 2 + 3
2 : 3 : 5
Number of adults = 1 u
(b)
Number of children = 9 u
Fraction of the children that were girls =
25 Number of girls
=
25 x 9 u
= 3
35 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
13 Number of men
=
13 x 1 u
=
13 u
(d)
Total number of people
= 1 u + 9 u
= 10 u
Answer(s): (a) 1; (b) 3
35; (c)
13; (d) 10