Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 3.
The ratio of boys to girls is 1 : 5.
The number of men to women is 5 : 1.
Let the number of children be 3 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
1 u |
3 u |
Men |
Women |
Boys |
Girls |
5 |
1 |
1 |
5 |
|
16 x 1 u = 16 u |
16 x 3 u = 12 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
1 : 5 : 1 + 5
1 : 5 : 6
Number of adults = 1 u
(b)
Number of children = 3 u
Fraction of the children that were boys =
16 Number of boys
=
16 x 3 u
=
12 u
(c)
Number of adults = 1 u
Fraction of the adults that were women =
16 Number of women
=
16 x 1 u
=
16 u
(d)
Total number of people
= 1 u + 3 u
= 4 u
Answer(s): (a) 1; (b)
12; (c)
16; (d) 4