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A fair die is tossed repeatedly until a six is obtained Let X denote the number of tosses required The probability that `X = 3` equals

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A fair die is tossed repeatedly until a six is obtained Let X denote the number of tosses required The probability that X=3 equals A. 25 216 B. 25 36 C. 5 36 D. 125 216 Select the correct answer from above options

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Correct Answer - A P(X=3)= Probability of getting 6 in third trial = 5 6 × 5 6 × 1 6 = 25 216

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