Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 9 : 4.
The ratio of boys to girls is 2 : 3.
The number of women to men is 2 : 5.
Let the number of children be 4 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
9 u |
4 u |
Women |
Men |
Boys |
Girls |
2 |
5 |
2 |
3 |
|
57 x 9 u = 637 u |
25 x 4 u = 135 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
2 : 3 : 2 + 3
2 : 3 : 5
Number of adults = 9 u
(b)
Number of children = 4 u
Fraction of the children that were boys =
25 Number of boys
=
25 x 4 u
= 1
35 u
(c)
Number of adults = 9 u
Fraction of the adults that were men =
57 Number of men
=
57 x 9 u
= 6
37 u
(d)
Total number of people
= 9 u + 4 u
= 13 u
Answer(s): (a) 9; (b) 1
35; (c) 6
37; (d) 13