Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 2.
The ratio of boys to girls is 4 : 1.
The number of women to men is 2 : 1.
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 |
1 u |
2 u |
Women |
Men |
Boys |
Girls |
2 |
1 |
4 |
1 |
|
13 x 1 u = 13 u |
45 x 2 u = 135 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
4 : 1 : 4 + 1
4 : 1 : 5
Number of adults = 1 u
(b)
Number of children = 2 u
Fraction of the children that were boys =
45 Number of boys
=
45 x 2 u
= 1
35 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
13 Number of men
=
13 x 1 u
=
13 u
(d)
Total number of people
= 1 u + 2 u
= 3 u
Answer(s): (a) 1; (b) 1
35; (c)
13; (d) 3