Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 4 : 5.
The ratio of girls to boys is 4 : 1.
The number of men to women is 2 : 1.
Let the number of children be 5 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
4 u |
5 u |
Men |
Women |
Girls |
Boys |
2 |
1 |
4 |
1 |
|
13 x 4 u = 113 u |
45 x 5 u = 4 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
4 : 1 : 4 + 1
4 : 1 : 5
Number of adults = 4 u
(b)
Number of children = 5 u
Fraction of the children that were girls =
45 Number of girls
=
45 x 5 u
= 4 u
(c)
Number of adults = 4 u
Fraction of the adults that were women =
13 Number of women
=
13 x 4 u
= 1
13 u
(d)
Total number of people
= 4 u + 5 u
= 9 u
Answer(s): (a) 4; (b) 4; (c) 1
13; (d) 9