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Q.A fair coin is tossed n times. The probability that the difference between the number of heads and tails is (n-1) is

a
12n1\dfrac{1}{2^{n-1}}
b
12n\dfrac{1}{2^n}
c
n2n\dfrac{n}{2^n}
d
(nn1)/2n\binom{n}{n-1}/2^n

Correct Answer: Option A

The correct solution involves applying the fundamental concept to derive the final value step by step...

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