Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 3 : 5.
The ratio of girls to boys is 5 : 1.
The number of women to men is 1 : 4.
Let the number of children be 5 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
3 u |
5 u |
Women |
Men |
Girls |
Boys |
1 |
4 |
5 |
1 |
|
45 x 3 u = 225 u |
56 x 5 u = 416 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
5 : 1 : 5 + 1
5 : 1 : 6
Number of adults = 3 u
(b)
Number of children = 5 u
Fraction of the children that were girls =
56 Number of girls
=
56 x 5 u
= 4
16 u
(c)
Number of adults = 3 u
Fraction of the adults that were men =
45 Number of men
=
45 x 3 u
= 2
25 u
(d)
Total number of people
= 3 u + 5 u
= 8 u
Answer(s): (a) 3; (b) 4
16; (c) 2
25; (d) 8