Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 5 : 4.
The ratio of boys to girls is 2 : 1.
The number of women to men is 6 : 1.
Let the number of children be 4 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
5 u |
4 u |
Women |
Men |
Boys |
Girls |
6 |
1 |
2 |
1 |
|
17 x 5 u = 57 u |
23 x 4 u = 223 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
2 : 1 : 2 + 1
2 : 1 : 3
Number of adults = 5 u
(b)
Number of children = 4 u
Fraction of the children that were boys =
23 Number of boys
=
23 x 4 u
= 2
23 u
(c)
Number of adults = 5 u
Fraction of the adults that were men =
17 Number of men
=
17 x 5 u
=
57 u
(d)
Total number of people
= 5 u + 4 u
= 9 u
Answer(s): (a) 5; (b) 2
23; (c)
57; (d) 9