Fill in the blanks.
The ratio of adults to children is 2 : 11.
The ratio of girls to boys is 8 : 11.
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 |
2x19 = 38 u |
11x19 = 209 u |
|
Girls |
Boys |
19 |
8x11 |
11x11 |
38 u |
88 u |
121 u |
(a)
Change ratio into units.
Girls : Boys : Children
8 : 11 : 8 + 11
8 : 11 : 19
The number of children is the repeated identity.
LCM of 11 and 19 is 209.
Number of adults = 38 u
(b)
Number of girls = 88 u
(c)
Difference in the number of boys and girls
= 121 u - 88 u
= 33 u
(d)
Total number of people
= 38 u + 209 u
= 247 u
Answer(s): (a) 38; (b) 88; (c) 33; (d) 247