Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 8.
The ratio of boys to girls is 1 : 1.
The number of women to men is 5 : 3.
Let the number of children be 8 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
8 u |
Women |
Men |
Boys |
Girls |
5 |
3 |
1 |
1 |
|
38 x 1 u = 38 u |
12 x 8 u = 4 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
1 : 1 : 1 + 1
1 : 1 : 2
Number of adults = 1 u
(b)
Number of children = 8 u
Fraction of the children that were boys =
12 Number of boys
=
12 x 8 u
= 4 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
38 Number of men
=
38 x 1 u
=
38 u
(d)
Total number of people
= 1 u + 8 u
= 9 u
Answer(s): (a) 1; (b) 4; (c)
38; (d) 9