Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 5 : 2.
The ratio of boys to girls is 3 : 1.
The number of women to men is 3 : 2.
Let the number of children be 2 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
5 u |
2 u |
Women |
Men |
Boys |
Girls |
3 |
2 |
3 |
1 |
|
25 x 5 u = 2 u |
34 x 2 u = 112 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
3 : 1 : 3 + 1
3 : 1 : 4
Number of adults = 5 u
(b)
Number of children = 2 u
Fraction of the children that were boys =
34 Number of boys
=
34 x 2 u
= 1
12 u
(c)
Number of adults = 5 u
Fraction of the adults that were men =
25 Number of men
=
25 x 5 u
= 2 u
(d)
Total number of people
= 5 u + 2 u
= 7 u
Answer(s): (a) 5; (b) 1
12; (c) 2; (d) 7