Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 7 : 11.
The ratio of boys to girls is 1 : 4.
The number of men to women is 2 : 3.
Let the number of children be 11 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
7 u |
11 u |
Men |
Women |
Boys |
Girls |
2 |
3 |
1 |
4 |
|
35 x 7 u = 415 u |
15 x 11 u = 215 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
1 : 4 : 1 + 4
1 : 4 : 5
Number of adults = 7 u
(b)
Number of children = 11 u
Fraction of the children that were boys =
15 Number of boys
=
15 x 11 u
= 2
15 u
(c)
Number of adults = 7 u
Fraction of the adults that were women =
35 Number of women
=
35 x 7 u
= 4
15 u
(d)
Total number of people
= 7 u + 11 u
= 18 u
Answer(s): (a) 7; (b) 2
15; (c) 4
15; (d) 18