Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 7.
The ratio of boys to girls is 5 : 4.
The number of women to men is 3 : 4.
Let the number of children be 7 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
7 u |
Women |
Men |
Boys |
Girls |
3 |
4 |
5 |
4 |
|
47 x 1 u = 47 u |
59 x 7 u = 389 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 = 7 u
Fraction of the children that were boys =
59 Number of boys
=
59 x 7 u
= 3
89 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
47 Number of men
=
47 x 1 u
=
47 u
(d)
Total number of people
= 1 u + 7 u
= 8 u
Answer(s): (a) 1; (b) 3
89; (c)
47; (d) 8