Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 2 : 7.
The ratio of girls to boys is 1 : 6.
The number of men to women is 1 : 4.
Let the number of children be 7 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
2 u |
7 u |
Men |
Women |
Girls |
Boys |
1 |
4 |
1 |
6 |
|
45 x 2 u = 135 u |
17 x 7 u = 1 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
1 : 6 : 1 + 6
1 : 6 : 7
Number of adults = 2 u
(b)
Number of children = 7 u
Fraction of the children that were girls =
17 Number of girls
=
17 x 7 u
= 1 u
(c)
Number of adults = 2 u
Fraction of the adults that were women =
45 Number of women
=
45 x 2 u
= 1
35 u
(d)
Total number of people
= 2 u + 7 u
= 9 u
Answer(s): (a) 2; (b) 1; (c) 1
35; (d) 9