Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 12.
The ratio of boys to girls is 5 : 2.
The number of men to women is 2 : 3.
Let the number of children be 12 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
12 u |
Men |
Women |
Boys |
Girls |
2 |
3 |
5 |
2 |
|
35 x 1 u = 35 u |
57 x 12 u = 847 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
5 : 2 : 5 + 2
5 : 2 : 7
Number of adults = 1 u
(b)
Number of children = 12 u
Fraction of the children that were boys =
57 Number of boys
=
57 x 12 u
= 8
47 u
(c)
Number of adults = 1 u
Fraction of the adults that were women =
35 Number of women
=
35 x 1 u
=
35 u
(d)
Total number of people
= 1 u + 12 u
= 13 u
Answer(s): (a) 1; (b) 8
47; (c)
35; (d) 13