Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 8 : 7.
The ratio of boys to girls is 4 : 5.
The number of men to women is 5 : 4.
Let the number of children be 7 u.
- Number of adults = _____ u
- Number of boys = _____ u
- Number of women = _____ u
- Total number of people = _____ u
Adults |
Children |
8 u |
7 u |
Men |
Women |
Boys |
Girls |
5 |
4 |
4 |
5 |
|
49 x 8 u = 359 u |
49 x 7 u = 319 u |
|
(a)
Change ratio into units.
Boys : Girls : Children
4 : 5 : 4 + 5
4 : 5 : 9
Number of adults = 8 u
(b)
Number of children = 7 u
Fraction of the children that were boys =
49 Number of boys
=
49 x 7 u
= 3
19 u
(c)
Number of adults = 8 u
Fraction of the adults that were women =
49 Number of women
=
49 x 8 u
= 3
59 u
(d)
Total number of people
= 8 u + 7 u
= 15 u
Answer(s): (a) 8; (b) 3
19; (c) 3
59; (d) 15