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 : 2.
The number of men to women is 4 : 11.
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 |
4 |
11 |
3 |
2 |
|
1115 x 3 u = 2.2 u |
35 x 4 u = 2.4 u |
|
(a)
Change ratio into units.
Number of adults = 3 u
(b)
Number of children = 4 u
Boys : Girls : Children
3 : 2 : 3 + 2
3 : 2 : 5
Fraction of the children that were boys =
35 Number of boys
=
35 x 4 u
= 2.4 u
(c)
Number of adults = 3 u
Fraction of the adults that were women =
1115 Number of women
=
1115 x 3 u
= 2.2 u
(d)
Difference between the number of boys and women
= 2.4 u - 2.2 u
= 0.2 u
Answer(s): (a) 3; (b) 2.4; (c) 2.2; (d) 0.2