Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 2 : 1.
The ratio of boys to girls is 4 : 5.
The number of women to men is 5 : 1.
Let the number of children be 1 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
2 u |
1 u |
Women |
Men |
Boys |
Girls |
5 |
1 |
4 |
5 |
|
16 x 2 u = 13 u |
49 x 1 u = 49 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
4 : 5 : 4 + 5
4 : 5 : 9
Number of adults = 2 u
(b)
Number of children = 1 u
Fraction of the children that were boys =
49 Number of boys
=
49 x 1 u
=
49 u
(c)
Number of adults = 2 u
Fraction of the adults that were men =
16 Number of men
=
16 x 2 u
=
13 u
(d)
Total number of people
= 2 u + 1 u
= 3 u
Answer(s): (a) 2; (b)
49; (c)
13; (d) 3