Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 8 : 9.
The ratio of girls to boys is 2 : 1.
The number of men to women is 2 : 1.
Let the number of children be 9 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
8 u |
9 u |
Men |
Women |
Girls |
Boys |
2 |
1 |
2 |
1 |
|
13 x 8 u = 223 u |
23 x 9 u = 6 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
2 : 1 : 2 + 1
2 : 1 : 3
Number of adults = 8 u
(b)
Number of children = 9 u
Fraction of the children that were girls =
23 Number of girls
=
23 x 9 u
= 6 u
(c)
Number of adults = 8 u
Fraction of the adults that were women =
13 Number of women
=
13 x 8 u
= 2
23 u
(d)
Total number of people
= 8 u + 9 u
= 17 u
Answer(s): (a) 8; (b) 6; (c) 2
23; (d) 17