Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 4.
The ratio of girls to boys is 4 : 5.
The number of women to men is 5 : 4.
Let the number of children be 4 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
4 u |
Women |
Men |
Girls |
Boys |
5 |
4 |
4 |
5 |
|
49 x 1 u = 49 u |
49 x 4 u = 179 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
4 : 5 : 4 + 5
4 : 5 : 9
Number of adults = 1 u
(b)
Number of children = 4 u
Fraction of the children that were girls =
49 Number of girls
=
49 x 4 u
= 1
79 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
49 Number of men
=
49 x 1 u
=
49 u
(d)
Total number of people
= 1 u + 4 u
= 5 u
Answer(s): (a) 1; (b) 1
79; (c)
49; (d) 5