Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 2 : 11.
The ratio of boys to girls is 9 : 11.
The number of men to women is 7 : 3.
Let the number of children be 11 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 |
11 u |
Men |
Women |
Boys |
Girls |
7 |
3 |
9 |
11 |
|
310 x 2 u = 0.6 u |
920 x 11 u = 4.95 u |
|
(a)
Change ratio into units.
Number of adults = 2 u
(b)
Number of children = 11 u
Boys : Girls : Children
9 : 11 : 9 + 11
9 : 11 : 20
Fraction of the children that were boys =
920 Number of boys
=
920 x 11 u
= 4.95 u
(c)
Number of adults = 2 u
Fraction of the adults that were women =
310 Number of women
=
310 x 2 u
= 0.6 u
(d)
Difference between the number of boys and women
= 4.95 u - 0.6 u
= 4.35 u
Answer(s): (a) 2; (b) 4.95; (c) 0.6; (d) 4.35