Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 7 : 10.
The ratio of girls to boys is 1 : 4.
The number of men to women is 3 : 5.
Let the number of children be 10 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
7 u |
10 u |
Men |
Women |
Girls |
Boys |
3 |
5 |
1 |
4 |
|
58 x 7 u = 438 u |
15 x 10 u = 2 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
1 : 4 : 1 + 4
1 : 4 : 5
Number of adults = 7 u
(b)
Number of children = 10 u
Fraction of the children that were girls =
15 Number of girls
=
15 x 10 u
= 2 u
(c)
Number of adults = 7 u
Fraction of the adults that were women =
58 Number of women
=
58 x 7 u
= 4
38 u
(d)
Total number of people
= 7 u + 10 u
= 17 u
Answer(s): (a) 7; (b) 2; (c) 4
38; (d) 17