Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 7 : 2.
The ratio of boys to girls is 6 : 1.
The number of women to men is 1 : 2.
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 |
7 u |
2 u |
Women |
Men |
Boys |
Girls |
1 |
2 |
6 |
1 |
|
23 x 7 u = 423 u |
67 x 2 u = 157 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
6 : 1 : 6 + 1
6 : 1 : 7
Number of adults = 7 u
(b)
Number of children = 2 u
Fraction of the children that were boys =
67 Number of boys
=
67 x 2 u
= 1
57 u
(c)
Number of adults = 7 u
Fraction of the adults that were men =
23 Number of men
=
23 x 7 u
= 4
23 u
(d)
Total number of people
= 7 u + 2 u
= 9 u
Answer(s): (a) 7; (b) 1
57; (c) 4
23; (d) 9