Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 3 : 4.
The ratio of boys to girls is 6 : 5.
The number of women to men is 2 : 1.
Let the number of children be 4 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
3 u |
4 u |
Women |
Men |
Boys |
Girls |
2 |
1 |
6 |
5 |
|
13 x 3 u = 1 u |
611 x 4 u = 2211 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
6 : 5 : 6 + 5
6 : 5 : 11
Number of adults = 3 u
(b)
Number of children = 4 u
Fraction of the children that were boys =
611 Number of boys
=
611 x 4 u
= 2
211 u
(c)
Number of adults = 3 u
Fraction of the adults that were men =
13 Number of men
=
13 x 3 u
= 1 u
(d)
Total number of people
= 3 u + 4 u
= 7 u
Answer(s): (a) 3; (b) 2
211; (c) 1; (d) 7