Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 3.
The ratio of boys to girls is 5 : 4.
The number of women to men is 5 : 3.
Let the number of children be 3 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
3 u |
Women |
Men |
Boys |
Girls |
5 |
3 |
5 |
4 |
|
38 x 1 u = 38 u |
59 x 3 u = 123 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
5 : 4 : 5 + 4
5 : 4 : 9
Number of adults = 1 u
(b)
Number of children = 3 u
Fraction of the children that were boys =
59 Number of boys
=
59 x 3 u
= 1
23 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
38 Number of men
=
38 x 1 u
=
38 u
(d)
Total number of people
= 1 u + 3 u
= 4 u
Answer(s): (a) 1; (b) 1
23; (c)
38; (d) 4