Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 2 : 5.
The ratio of boys to girls is 1 : 1.
The number of men to women is 2 : 1.
Let the number of children be 5 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
2 u |
5 u |
Men |
Women |
Boys |
Girls |
2 |
1 |
1 |
1 |
|
13 x 2 u = 23 u |
12 x 5 u = 212 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
1 : 1 : 1 + 1
1 : 1 : 2
Number of adults = 2 u
(b)
Number of children = 5 u
Fraction of the children that were boys =
12 Number of boys
=
12 x 5 u
= 2
12 u
(c)
Number of adults = 2 u
Fraction of the adults that were women =
13 Number of women
=
13 x 2 u
=
23 u
(d)
Total number of people
= 2 u + 5 u
= 7 u
Answer(s): (a) 2; (b) 2
12; (c)
23; (d) 7