1.

Let X represent the difference between the number of heads and the number of tails obtained when a coin is tossed n times. Then the possible values of X are _________. (a) i + 2n, i = 0, 1, 2 … n (b) 2i – n, i = 0, 1, 2 … n (c) n – i, i = 0, 1, 2 … n (d) 2i + 2n, i = 0, 1, 2 … n

Answer»

(b) 2i – n, i = 0, 1, 2 … n



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