Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 1.
The ratio of girls to boys is 2 : 5.
The number of women to men is 2 : 1.
Let the number of children be 1 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
1 u |
Women |
Men |
Girls |
Boys |
2 |
1 |
2 |
5 |
|
13 x 1 u = 13 u |
27 x 1 u = 27 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
2 : 5 : 2 + 5
2 : 5 : 7
Number of adults = 1 u
(b)
Number of children = 1 u
Fraction of the children that were girls =
27 Number of girls
=
27 x 1 u
=
27 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 + 1 u
= 2 u
Answer(s): (a) 1; (b)
27; (c)
13; (d) 2