Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 3 : 1.
The ratio of boys to girls is 2 : 1.
The number of men to women is 3 : 2.
Let the number of children be 1 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
3 u |
1 u |
Men |
Women |
Boys |
Girls |
3 |
2 |
2 |
1 |
|
25 x 3 u = 115 u |
23 x 1 u = 23 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
2 : 1 : 2 + 1
2 : 1 : 3
Number of adults = 3 u
(b)
Number of children = 1 u
Fraction of the children that were boys =
23 Number of boys
=
23 x 1 u
=
23 u
(c)
Number of adults = 3 u
Fraction of the adults that were women =
25 Number of women
=
25 x 3 u
= 1
15 u
(d)
Total number of people
= 3 u + 1 u
= 4 u
Answer(s): (a) 3; (b)
23; (c) 1
15; (d) 4