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Robability of obtaining a head

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Reference no: EM131832465

Suppose that a sequence of independent tosses are made with a coin lor which the probability of obtaining a head on any given toss is 1/30.

(a) What is the expected number of tails that will be obtained before five heads have been obtained?

(b) What is the variance of the number of tails that will be obtained before five heads have been obtained?

Reference no: EM131832465

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