Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 8 : 7.
The ratio of boys to girls is 4 : 3.
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 |
8 u |
7 u |
Women |
Men |
Boys |
Girls |
2 |
1 |
4 |
3 |
|
13 x 8 u = 223 u |
47 x 7 u = 4 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
4 : 3 : 4 + 3
4 : 3 : 7
Number of adults = 8 u
(b)
Number of children = 7 u
Fraction of the children that were boys =
47 Number of boys
=
47 x 7 u
= 4 u
(c)
Number of adults = 8 u
Fraction of the adults that were men =
13 Number of men
=
13 x 8 u
= 2
23 u
(d)
Total number of people
= 8 u + 7 u
= 15 u
Answer(s): (a) 8; (b) 4; (c) 2
23; (d) 15