Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 2 : 7.
The ratio of boys to girls is 5 : 1.
The number of women to men is 2 : 1.
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 |
2 u |
7 u |
Women |
Men |
Boys |
Girls |
2 |
1 |
5 |
1 |
|
13 x 2 u = 23 u |
56 x 7 u = 556 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
5 : 1 : 5 + 1
5 : 1 : 6
Number of adults = 2 u
(b)
Number of children = 7 u
Fraction of the children that were boys =
56 Number of boys
=
56 x 7 u
= 5
56 u
(c)
Number of adults = 2 u
Fraction of the adults that were men =
13 Number of men
=
13 x 2 u
=
23 u
(d)
Total number of people
= 2 u + 7 u
= 9 u
Answer(s): (a) 2; (b) 5
56; (c)
23; (d) 9