Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 3 : 4.
The ratio of boys to girls is 3 : 5.
The number of men to women is 2 : 1.
Let the number of children be 4 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Difference between the number of boys and women = _____ u
Adults |
Children |
3 u |
4 u |
Men |
Women |
Boys |
Girls |
2 |
1 |
3 |
5 |
|
13 x 3 u = 1 u |
38 x 4 u = 1.5 u |
|
(a)
Change ratio into units.
Number of adults = 3 u
(b)
Number of children = 4 u
Boys : Girls : Children
3 : 5 : 3 + 5
3 : 5 : 8
Fraction of the children that were boys =
38 Number of boys
=
38 x 4 u
= 1.5 u
(c)
Number of adults = 3 u
Fraction of the adults that were women =
13 Number of women
=
13 x 3 u
= 1 u
(d)
Difference between the number of boys and women
= 1.5 u - 1 u
= 0.5 u
Answer(s): (a) 3; (b) 1.5; (c) 1; (d) 0.5