Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 7 : 3.
The ratio of boys to girls is 1 : 1.
The number of men to women is 1 : 2.
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 |
7 u |
3 u |
Men |
Women |
Boys |
Girls |
1 |
2 |
1 |
1 |
|
23 x 7 u = 423 u |
12 x 3 u = 112 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
1 : 1 : 1 + 1
1 : 1 : 2
Number of adults = 7 u
(b)
Number of children = 3 u
Fraction of the children that were boys =
12 Number of boys
=
12 x 3 u
= 1
12 u
(c)
Number of adults = 7 u
Fraction of the adults that were women =
23 Number of women
=
23 x 7 u
= 4
23 u
(d)
Total number of people
= 7 u + 3 u
= 10 u
Answer(s): (a) 7; (b) 1
12; (c) 4
23; (d) 10