Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 8 : 11.
The ratio of boys to girls is 1 : 4.
The number of women to men is 1 : 3.
Let the number of children be 11 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
8 u |
11 u |
Women |
Men |
Boys |
Girls |
1 |
3 |
1 |
4 |
|
34 x 8 u = 6 u |
15 x 11 u = 215 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
1 : 4 : 1 + 4
1 : 4 : 5
Number of adults = 8 u
(b)
Number of children = 11 u
Fraction of the children that were boys =
15 Number of boys
=
15 x 11 u
= 2
15 u
(c)
Number of adults = 8 u
Fraction of the adults that were men =
34 Number of men
=
34 x 8 u
= 6 u
(d)
Total number of people
= 8 u + 11 u
= 19 u
Answer(s): (a) 8; (b) 2
15; (c) 6; (d) 19