Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 3 : 4.
The ratio of boys to girls is 5 : 6.
The number of women to men is 5 : 6.
Let the number of children be 4 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
3 u |
4 u |
Women |
Men |
Boys |
Girls |
5 |
6 |
5 |
6 |
|
611 x 3 u = 1711 u |
511 x 4 u = 1911 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
5 : 6 : 5 + 6
5 : 6 : 11
Number of adults = 3 u
(b)
Number of children = 4 u
Fraction of the children that were boys =
511 Number of boys
=
511 x 4 u
= 1
911 u
(c)
Number of adults = 3 u
Fraction of the adults that were men =
611 Number of men
=
611 x 3 u
= 1
711 u
(d)
Total number of people
= 3 u + 4 u
= 7 u
Answer(s): (a) 3; (b) 1
911; (c) 1
711; (d) 7