Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 8 : 9.
The ratio of boys to girls is 5 : 2.
The number of men to women is 3 : 5.
Let the number of children be 9 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
8 u |
9 u |
Men |
Women |
Boys |
Girls |
3 |
5 |
5 |
2 |
|
58 x 8 u = 5 u |
57 x 9 u = 637 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
5 : 2 : 5 + 2
5 : 2 : 7
Number of adults = 8 u
(b)
Number of children = 9 u
Fraction of the children that were boys =
57 Number of boys
=
57 x 9 u
= 6
37 u
(c)
Number of adults = 8 u
Fraction of the adults that were women =
58 Number of women
=
58 x 8 u
= 5 u
(d)
Total number of people
= 8 u + 9 u
= 17 u
Answer(s): (a) 8; (b) 6
37; (c) 5; (d) 17