Fill in the blanks.
The ratio of adults to children is 6 : 11.
The ratio of girls to boys is 4 : 5.
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 |
6x9 = 54 u |
11x9 = 99 u |
|
Girls |
Boys |
9 |
4x11 |
5x11 |
54 u |
44 u |
55 u |
(a)
Change ratio into units.
Girls : Boys : Children
4 : 5 : 4 + 5
4 : 5 : 9
The number of children is the repeated identity.
LCM of 11 and 9 is 99.
Number of adults = 54 u
(b)
Number of girls = 44 u
(c)
Difference in the number of boys and girls
= 55 u - 44 u
= 11 u
(d)
Total number of people
= 54 u + 99 u
= 153 u
Answer(s): (a) 54; (b) 44; (c) 11; (d) 153