0 RISHABH ANANTIntermediate Asked: December 4, 20202020-12-04T21:59:23+05:30 2020-12-04T21:59:23+05:30In: BM/LRS (CA Foundation) PERMUTATION and COMBINATION 0 Question no 32 Please explain it Share Sorry, you do not have permission to answer to this question. 1 Answer Oldest Gitika Chandirani11 Pro 2020-12-05T16:47:03+05:30Added an answer on December 5, 2020 at 4:47 pm nc1+ nc2 + nc3 …..ncn-1 Adding and subtracting nco and ncn in the series Nc0+ nc1+ nc2 + nc3 …..ncn-1+ ncn – nc0 – ncn We know Nc0+ nc1+ nc2 + nc3 …..ncn-1+ ncn = 2^n And nc0 and ncn = 1 So 2^n – 1 – 1 2^n – 2 = 254 N = 8
nc1+ nc2 + nc3 …..ncn-1
Adding and subtracting nco and ncn in the series
Nc0+ nc1+ nc2 + nc3 …..ncn-1+ ncn – nc0 – ncn
We know
Nc0+ nc1+ nc2 + nc3 …..ncn-1+ ncn = 2^n
And nc0 and ncn = 1
So 2^n – 1 – 1
2^n – 2 = 254
N = 8