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 2 : 1.
The number of women to men is 6 : 1.
Let the number of children be 9 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
8 u |
9 u |
Women |
Men |
Boys |
Girls |
6 |
1 |
2 |
1 |
|
17 x 8 u = 117 u |
23 x 9 u = 6 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
2 : 1 : 2 + 1
2 : 1 : 3
Number of adults = 8 u
(b)
Number of children = 9 u
Fraction of the children that were boys =
23 Number of boys
=
23 x 9 u
= 6 u
(c)
Number of adults = 8 u
Fraction of the adults that were men =
17 Number of men
=
17 x 8 u
= 1
17 u
(d)
Total number of people
= 8 u + 9 u
= 17 u
Answer(s): (a) 8; (b) 6; (c) 1
17; (d) 17