Fill in the blanks.
The ratio of adults to children is 8 : 5.
The ratio of boys to girls is 3 : 5.
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 |
8x8 = 64 u |
5x8 = 40 u |
|
Boys |
Girls |
8 |
3x5 |
5x5 |
64 u |
15 u |
25 u |
(a)
Change ratio into units.
Boys : Girls : Children
3 : 5 : 3 + 5
3 : 5 : 8
The number of children is the repeated identity.
LCM of 5 and 8 is 40.
Number of adults = 64 u
(b)
Number of boys = 15 u
(c)
Difference in the number of girls and boys
= 25 u - 15 u
= 10 u
(d)
Total number of people
= 64 u + 40 u
= 104 u
Answer(s): (a) 64; (b) 15; (c) 10; (d) 104