Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 12.
The ratio of boys to girls is 5 : 1.
The number of women to men is 5 : 2.
Let the number of children be 12 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
12 u |
Women |
Men |
Boys |
Girls |
5 |
2 |
5 |
1 |
|
27 x 1 u = 27 u |
56 x 12 u = 10 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
5 : 1 : 5 + 1
5 : 1 : 6
Number of adults = 1 u
(b)
Number of children = 12 u
Fraction of the children that were boys =
56 Number of boys
=
56 x 12 u
= 10 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
27 Number of men
=
27 x 1 u
=
27 u
(d)
Total number of people
= 1 u + 12 u
= 13 u
Answer(s): (a) 1; (b) 10; (c)
27; (d) 13