Fill in the blanks.
The ratio of adults to children is 1 : 1.
The ratio of boys to girls is 8 : 11.
Use LCM and find the following.
- Number of adults = _____ u
- Number of boys = _____ u
- Difference in the number of girls and boys = _____ u
- Total number of people = _____ u
Adults |
Children |
1x19 = 19 u |
1x19 = 19 u |
|
Boys |
Girls |
19 |
8x1 |
11x1 |
19 u |
8 u |
11 u |
(a)
Change ratio into units.
Boys : Girls : Children
8 : 11 : 8 + 11
8 : 11 : 19
The number of children is the repeated identity.
LCM of 1 and 19 is 19.
Number of adults = 19 u
(b)
Number of boys = 8 u
(c)
Difference in the number of girls and boys
= 11 u - 8 u
= 3 u
(d)
Total number of people
= 19 u + 19 u
= 38 u
Answer(s): (a) 19; (b) 8; (c) 3; (d) 38