Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 4 : 5.
The ratio of boys to girls is 1 : 3.
The number of women to men is 1 : 2.
Let the number of children be 5 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
4 u |
5 u |
Women |
Men |
Boys |
Girls |
1 |
2 |
1 |
3 |
|
23 x 4 u = 223 u |
14 x 5 u = 114 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
1 : 3 : 1 + 3
1 : 3 : 4
Number of adults = 4 u
(b)
Number of children = 5 u
Fraction of the children that were boys =
14 Number of boys
=
14 x 5 u
= 1
14 u
(c)
Number of adults = 4 u
Fraction of the adults that were men =
23 Number of men
=
23 x 4 u
= 2
23 u
(d)
Total number of people
= 4 u + 5 u
= 9 u
Answer(s): (a) 4; (b) 1
14; (c) 2
23; (d) 9