Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 1 : 4.
The ratio of boys to girls is 2 : 5.
The number of women to men is 1 : 2.
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 |
1 u |
4 u |
Women |
Men |
Boys |
Girls |
1 |
2 |
2 |
5 |
|
23 x 1 u = 23 u |
27 x 4 u = 117 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
2 : 5 : 2 + 5
2 : 5 : 7
Number of adults = 1 u
(b)
Number of children = 4 u
Fraction of the children that were boys =
27 Number of boys
=
27 x 4 u
= 1
17 u
(c)
Number of adults = 1 u
Fraction of the adults that were men =
23 Number of men
=
23 x 1 u
=
23 u
(d)
Total number of people
= 1 u + 4 u
= 5 u
Answer(s): (a) 1; (b) 1
17; (c)
23; (d) 5