Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 5 : 2.
The ratio of boys to girls is 3 : 2.
The number of men to women is 4 : 1.
Let the number of children be 2 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
5 u |
2 u |
Men |
Women |
Boys |
Girls |
4 |
1 |
3 |
2 |
|
15 x 5 u = 1 u |
35 x 2 u = 115 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
3 : 2 : 3 + 2
3 : 2 : 5
Number of adults = 5 u
(b)
Number of children = 2 u
Fraction of the children that were boys =
35 Number of boys
=
35 x 2 u
= 1
15 u
(c)
Number of adults = 5 u
Fraction of the adults that were women =
15 Number of women
=
15 x 5 u
= 1 u
(d)
Total number of people
= 5 u + 2 u
= 7 u
Answer(s): (a) 5; (b) 1
15; (c) 1; (d) 7