Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 9 : 11.
The ratio of boys to girls is 3 : 4.
The number of men to women is 5 : 1.
Let the number of children be 11 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
9 u |
11 u |
Men |
Women |
Boys |
Girls |
5 |
1 |
3 |
4 |
|
16 x 9 u = 112 u |
37 x 11 u = 457 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
3 : 4 : 3 + 4
3 : 4 : 7
Number of adults = 9 u
(b)
Number of children = 11 u
Fraction of the children that were boys =
37 Number of boys
=
37 x 11 u
= 4
57 u
(c)
Number of adults = 9 u
Fraction of the adults that were women =
16 Number of women
=
16 x 9 u
= 1
12 u
(d)
Total number of people
= 9 u + 11 u
= 20 u
Answer(s): (a) 9; (b) 4
57; (c) 1
12; (d) 20