If in a group of n distinct objects, the number of arrangements of 4 objects is 12 times the number of arrangements of 2 objects, then the number of objects is
A. 10
B. 8
C. 6
D. none of these.
Answer:C
If in a group of n distinct objects, the number of arrangements of 4 objects is 12 times the number of arrangements of 2 objects, then the number of objects is
A. 10 B. 8 C. 6 D. none of these.