Grade 11Algebra
Question is from permutation and combination.please see the attachment.2 questions are provided.
1 Answer
Arun
Approved Tutor Answer8 Years agoFor 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)
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