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 3 : 1.
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 |
5 u |
4 u |
Men |
Women |
Boys |
Girls |
1 |
3 |
3 |
1 |
|
34 x 5 u = 334 u |
34 x 4 u = 3 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
3 : 1 : 3 + 1
3 : 1 : 4
Number of adults = 5 u
(b)
Number of children = 4 u
Fraction of the children that were boys =
34 Number of boys
=
34 x 4 u
= 3 u
(c)
Number of adults = 5 u
Fraction of the adults that were women =
34 Number of women
=
34 x 5 u
= 3
34 u
(d)
Total number of people
= 5 u + 4 u
= 9 u
Answer(s): (a) 5; (b) 3; (c) 3
34; (d) 9