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 3 : 1.
The number of women to men is 6 : 1.
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 |
6 |
1 |
3 |
1 |
|
17 x 4 u = 47 u |
34 x 5 u = 334 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
3 : 1 : 3 + 1
3 : 1 : 4
Number of adults = 4 u
(b)
Number of children = 5 u
Fraction of the children that were boys =
34 Number of boys
=
34 x 5 u
= 3
34 u
(c)
Number of adults = 4 u
Fraction of the adults that were men =
17 Number of men
=
17 x 4 u
=
47 u
(d)
Total number of people
= 4 u + 5 u
= 9 u
Answer(s): (a) 4; (b) 3
34; (c)
47; (d) 9