Question is from permutation and combination.please see the attachment.2 questions are provided.
Subodh Pandit , 8 Years ago
Grade 11
Algebra> Question is from permutation and combinat...
1 Answers
Arun
For the first one,
Let the number of candidates = n
Now
nC1 + nC2 + nC3+ ......+ nC(n-1) = 2^n -2 = 254
2^n = 256
n = 8 ways
Regards
Arun(askIITians forum expert)
Approved Last Activity: 8 Years ago
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