Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 9 : 10.
The ratio of girls to boys is 1 : 6.
The number of women to men is 2 : 1.
Let the number of children be 10 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
9 u |
10 u |
Women |
Men |
Girls |
Boys |
2 |
1 |
1 |
6 |
|
13 x 9 u = 3 u |
17 x 10 u = 137 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
1 : 6 : 1 + 6
1 : 6 : 7
Number of adults = 9 u
(b)
Number of children = 10 u
Fraction of the children that were girls =
17 Number of girls
=
17 x 10 u
= 1
37 u
(c)
Number of adults = 9 u
Fraction of the adults that were men =
13 Number of men
=
13 x 9 u
= 3 u
(d)
Total number of people
= 9 u + 10 u
= 19 u
Answer(s): (a) 9; (b) 1
37; (c) 3; (d) 19