Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 5 : 7.
The ratio of girls to boys is 4 : 5.
The number of women to men is 5 : 6.
Let the number of children be 7 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
5 u |
7 u |
Women |
Men |
Girls |
Boys |
5 |
6 |
4 |
5 |
|
611 x 5 u = 2811 u |
49 x 7 u = 319 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
4 : 5 : 4 + 5
4 : 5 : 9
Number of adults = 5 u
(b)
Number of children = 7 u
Fraction of the children that were girls =
49 Number of girls
=
49 x 7 u
= 3
19 u
(c)
Number of adults = 5 u
Fraction of the adults that were men =
611 Number of men
=
611 x 5 u
= 2
811 u
(d)
Total number of people
= 5 u + 7 u
= 12 u
Answer(s): (a) 5; (b) 3
19; (c) 2
811; (d) 12