Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 4 : 5.
The ratio of boys to girls is 2 : 3.
The number of men to women is 3 : 2.
Let the number of children be 5 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
4 u |
5 u |
Men |
Women |
Boys |
Girls |
3 |
2 |
2 |
3 |
|
25 x 4 u = 135 u |
25 x 5 u = 2 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
2 : 3 : 2 + 3
2 : 3 : 5
Number of adults = 4 u
(b)
Number of children = 5 u
Fraction of the children that were boys =
25 Number of boys
=
25 x 5 u
= 2 u
(c)
Number of adults = 4 u
Fraction of the adults that were women =
25 Number of women
=
25 x 4 u
= 1
35 u
(d)
Total number of people
= 4 u + 5 u
= 9 u
Answer(s): (a) 4; (b) 2; (c) 1
35; (d) 9