Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 3 : 1.
The ratio of boys to girls is 5 : 3.
The number of men to women is 1 : 5.
Let the number of children be 1 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
3 u |
1 u |
Men |
Women |
Boys |
Girls |
1 |
5 |
5 |
3 |
|
56 x 3 u = 212 u |
58 x 1 u = 58 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
5 : 3 : 5 + 3
5 : 3 : 8
Number of adults = 3 u
(b)
Number of children = 1 u
Fraction of the children that were boys =
58 Number of boys
=
58 x 1 u
=
58 u
(c)
Number of adults = 3 u
Fraction of the adults that were women =
56 Number of women
=
56 x 3 u
= 2
12 u
(d)
Total number of people
= 3 u + 1 u
= 4 u
Answer(s): (a) 3; (b)
58; (c) 2
12; (d) 4