Fill in the blanks.
The ratio of adults to children is 8 : 11.
The ratio of girls to boys is 1 : 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 |
8x5 = 40 u |
11x5 = 55 u |
|
Girls |
Boys |
5 |
1x11 |
4x11 |
40 u |
11 u |
44 u |
(a)
Change ratio into units.
Girls : Boys : Children
1 : 4 : 1 + 4
1 : 4 : 5
The number of children is the repeated identity.
LCM of 11 and 5 is 55.
Number of adults = 40 u
(b)
Number of girls = 11 u
(c)
Difference in the number of boys and girls
= 44 u - 11 u
= 33 u
(d)
Total number of people
= 40 u + 55 u
= 95 u
Answer(s): (a) 40; (b) 11; (c) 33; (d) 95