Fill in the blanks.
The ratio of adults to children is 9 : 11.
The ratio of girls to boys is 5 : 6.
Use LCM and find the following.
- Number of adults = _____ u
- Number of girls = _____ u
- Difference in the number of boys and girls = _____ u
- Total number of people = _____ u
Adults |
Children |
9x1 = 9 u |
11x1 = 11 u |
|
Girls |
Boys |
11 |
5x1 |
6x1 |
9 u |
5 u |
6 u |
(a)
Change ratio into units.
Girls : Boys : Children
5 : 6 : 5 + 6
5 : 6 : 11
The number of children is the repeated identity.
LCM of 11 and 11 is 11.
Number of adults = 9 u
(b)
Number of girls = 5 u
(c)
Difference in the number of boys and girls
= 6 u - 5 u
= 1 u
(d)
Total number of people
= 9 u + 11 u
= 20 u
Answer(s): (a) 9; (b) 5; (c) 1; (d) 20