Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 7 : 5.
The ratio of boys to girls is 6 : 1.
The number of women to men is 3 : 2.
Let the number of children be 5 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
7 u |
5 u |
Women |
Men |
Boys |
Girls |
3 |
2 |
6 |
1 |
|
25 x 7 u = 245 u |
67 x 5 u = 427 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
6 : 1 : 6 + 1
6 : 1 : 7
Number of adults = 7 u
(b)
Number of children = 5 u
Fraction of the children that were boys =
67 Number of boys
=
67 x 5 u
= 4
27 u
(c)
Number of adults = 7 u
Fraction of the adults that were men =
25 Number of men
=
25 x 7 u
= 2
45 u
(d)
Total number of people
= 7 u + 5 u
= 12 u
Answer(s): (a) 7; (b) 4
27; (c) 2
45; (d) 12