Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 3 : 4.
The ratio of boys to girls is 1 : 2.
The number of men to women is 1 : 3.
Let the number of children be 4 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
3 u |
4 u |
Men |
Women |
Boys |
Girls |
1 |
3 |
1 |
2 |
|
34 x 3 u = 214 u |
13 x 4 u = 113 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
1 : 2 : 1 + 2
1 : 2 : 3
Number of adults = 3 u
(b)
Number of children = 4 u
Fraction of the children that were boys =
13 Number of boys
=
13 x 4 u
= 1
13 u
(c)
Number of adults = 3 u
Fraction of the adults that were women =
34 Number of women
=
34 x 3 u
= 2
14 u
(d)
Total number of people
= 3 u + 4 u
= 7 u
Answer(s): (a) 3; (b) 1
13; (c) 2
14; (d) 7