Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 2 : 11.
The ratio of boys to girls is 1 : 2.
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 |
2 u |
11 u |
Women |
Men |
Boys |
Girls |
1 |
3 |
1 |
2 |
|
34 x 2 u = 112 u |
13 x 11 u = 323 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
1 : 2 : 1 + 2
1 : 2 : 3
Number of adults = 2 u
(b)
Number of children = 11 u
Fraction of the children that were boys =
13 Number of boys
=
13 x 11 u
= 3
23 u
(c)
Number of adults = 2 u
Fraction of the adults that were men =
34 Number of men
=
34 x 2 u
= 1
12 u
(d)
Total number of people
= 2 u + 11 u
= 13 u
Answer(s): (a) 2; (b) 3
23; (c) 1
12; (d) 13