Fill in the blanks.
The ratio of adults to children is 5 : 7.
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 |
5x11 = 55 u |
7x11 = 77 u |
|
Girls |
Boys |
11 |
5x7 |
6x7 |
55 u |
35 u |
42 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 7 and 11 is 77.
Number of adults = 55 u
(b)
Number of girls = 35 u
(c)
Difference in the number of boys and girls
= 42 u - 35 u
= 7 u
(d)
Total number of people
= 55 u + 77 u
= 132 u
Answer(s): (a) 55; (b) 35; (c) 7; (d) 132