CBSE NET June 2011
Q. The number of different trees with 8 nodes is
(A) 256
(B) 255
(C) 248
(D) None of the above
Ans :- (C)
Explanation:-
Use formula 2n-n. Here the value of n=8. So, the formula would become 28-8=256-8=248.
Use formula 2n-n. Here the value of n=8. So, the formula would become 28-8=256-8=248.