Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 8 : 5.
The ratio of boys to girls is 4 : 1.
The number of men to women is 3 : 4.
Let the number of children be 5 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
8 u |
5 u |
Men |
Women |
Boys |
Girls |
3 |
4 |
4 |
1 |
|
47 x 8 u = 447 u |
45 x 5 u = 4 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
4 : 1 : 4 + 1
4 : 1 : 5
Number of adults = 8 u
(b)
Number of children = 5 u
Fraction of the children that were boys =
45 Number of boys
=
45 x 5 u
= 4 u
(c)
Number of adults = 8 u
Fraction of the adults that were women =
47 Number of women
=
47 x 8 u
= 4
47 u
(d)
Total number of people
= 8 u + 5 u
= 13 u
Answer(s): (a) 8; (b) 4; (c) 4
47; (d) 13