Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 2 : 7.
The ratio of boys to girls is 1 : 3.
The number of men to women is 4 : 1.
Let the number of children be 7 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Difference between the number of boys and women = _____ u
Adults |
Children |
2 u |
7 u |
Men |
Women |
Boys |
Girls |
4 |
1 |
1 |
3 |
|
15 x 2 u = 0.4 u |
14 x 7 u = 1.75 u |
|
(a)
Change ratio into units.
Number of adults = 2 u
(b)
Number of children = 7 u
Boys : Girls : Children
1 : 3 : 1 + 3
1 : 3 : 4
Fraction of the children that were boys =
14 Number of boys
=
14 x 7 u
= 1.75 u
(c)
Number of adults = 2 u
Fraction of the adults that were women =
15 Number of women
=
15 x 2 u
= 0.4 u
(d)
Difference between the number of boys and women
= 1.75 u - 0.4 u
= 1.35 u
Answer(s): (a) 2; (b) 1.75; (c) 0.4; (d) 1.35