Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 8.
The ratio of boys to girls is 3 : 1.
The number of men to women is 4 : 1.
Let the number of children be 8 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
8 u |
Men |
Women |
Boys |
Girls |
4 |
1 |
3 |
1 |
|
15 x 1 u = 15 u |
34 x 8 u = 6 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
3 : 1 : 3 + 1
3 : 1 : 4
Number of adults = 1 u
(b)
Number of children = 8 u
Fraction of the children that were boys =
34 Number of boys
=
34 x 8 u
= 6 u
(c)
Number of adults = 1 u
Fraction of the adults that were women =
15 Number of women
=
15 x 1 u
=
15 u
(d)
Total number of people
= 1 u + 8 u
= 9 u
Answer(s): (a) 1; (b) 6; (c)
15; (d) 9