Fill in the blanks in whole numbers or decimals.
The ratio of adults to children is 4 : 9.
The ratio of girls to boys is 1 : 5.
The number of men to women is 4 : 1.
Let the number of children be 9 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of women = _____ u
- Difference between the number of girls and women = _____ u
Adults |
Children |
4 u |
9 u |
Men |
Women |
Girls |
Boys |
4 |
1 |
1 |
5 |
|
15 x 4 u = 0.8 u |
16 x 9 u = 1.5 u |
|
(a)
Change ratio into units.
Number of adults = 4 u
(b)
Number of children = 9 u
Girls : Boys : Children
1 : 5 : 1 + 5
1 : 5 : 6
Fraction of the children that were girls =
16 Number of girls
=
16 x 9 u
= 1.5 u
(c)
Number of adults = 4 u
Fraction of the adults that were women =
15 Number of women
=
15 x 4 u
= 0.8 u
(d)
Difference between the number of girls and women
= 1.5 u - 0.8 u
= 0.7 u
Answer(s): (a) 4; (b) 1.5; (c) 0.8; (d) 0.7