Fill in the blanks.
The ratio of adults to children is 5 : 11.
The ratio of girls to boys is 3 : 4.
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 |
5x7 = 35 u |
11x7 = 77 u |
|
Girls |
Boys |
7 |
3x11 |
4x11 |
35 u |
33 u |
44 u |
(a)
Change ratio into units.
Girls : Boys : Children
3 : 4 : 3 + 4
3 : 4 : 7
The number of children is the repeated identity.
LCM of 11 and 7 is 77.
Number of adults = 35 u
(b)
Number of girls = 33 u
(c)
Difference in the number of boys and girls
= 44 u - 33 u
= 11 u
(d)
Total number of people
= 35 u + 77 u
= 112 u
Answer(s): (a) 35; (b) 33; (c) 11; (d) 112