Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 3 : 10.
The ratio of boys to girls is 1 : 2.
The number of women to men is 2 : 1.
Let the number of children be 10 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
3 u |
10 u |
Women |
Men |
Boys |
Girls |
2 |
1 |
1 |
2 |
|
13 x 3 u = 1 u |
13 x 10 u = 313 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
1 : 2 : 1 + 2
1 : 2 : 3
Number of adults = 3 u
(b)
Number of children = 10 u
Fraction of the children that were boys =
13 Number of boys
=
13 x 10 u
= 3
13 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 + 10 u
= 13 u
Answer(s): (a) 3; (b) 3
13; (c) 1; (d) 13