Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 3 : 8.
The ratio of boys to girls is 7 : 3.
The number of men to women is 7 : 3.
Let the number of children be 8 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 |
8 u |
Men |
Women |
Boys |
Girls |
7 |
3 |
7 |
3 |
|
310 x 3 u = 0.9 u |
710 x 8 u = 5.6 u |
|
(a)
Change ratio into units.
Number of adults = 3 u
(b)
Number of children = 8 u
Boys : Girls : Children
7 : 3 : 7 + 3
7 : 3 : 10
Fraction of the children that were boys =
710 Number of boys
=
710 x 8 u
= 5.6 u
(c)
Number of adults = 3 u
Fraction of the adults that were women =
310 Number of women
=
310 x 3 u
= 0.9 u
(d)
Difference between the number of boys and women
= 5.6 u - 0.9 u
= 4.7 u
Answer(s): (a) 3; (b) 5.6; (c) 0.9; (d) 4.7