Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 9 : 2.
The ratio of girls to boys is 2 : 5.
The number of men to women is 5 : 1.
Let the number of children be 2 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
9 u |
2 u |
Men |
Women |
Girls |
Boys |
5 |
1 |
2 |
5 |
|
16 x 9 u = 112 u |
27 x 2 u = 47 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
2 : 5 : 2 + 5
2 : 5 : 7
Number of adults = 9 u
(b)
Number of children = 2 u
Fraction of the children that were girls =
27 Number of girls
=
27 x 2 u
=
47 u
(c)
Number of adults = 9 u
Fraction of the adults that were women =
16 Number of women
=
16 x 9 u
= 1
12 u
(d)
Total number of people
= 9 u + 2 u
= 11 u
Answer(s): (a) 9; (b)
47; (c) 1
12; (d) 11