The probability of guessing a correct answer to a certain question is – InterviewSolution

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1.	The probability of guessing a correct answer to a certain question is x/2, If the probability of notguessing the correct answer to the question is 2/3Then
Answer» Let E denote the eventof guessing a correct question andEbardenote the eventof not guessing a correct question.Given probability of guessing a certain question is P(E) = (x/2)Hence probability of not guessing answer isP(E bar) = (2/3)P(E) + P(E bar) = 1x / 2 + 2 / 3 = 1x / 2 = 1 / 3∴x = 2/ 3.Hence x = 2/3.

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