Permutations And Combinations Question 118
Question: In an election the number of candidates is 1 greater than the persons to be elected. If a voter can vote in 254 ways, then the number of candidates is
Options:
A) 7
B) 10
C) 8
D) 6
Correct Answer: C $ \Rightarrow $ $ 2^{n}-2=254 $ $ \Rightarrow $ $ 2^{n}=2^{8} $ $ \Rightarrow $ $ n=8 $ .
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BETA
