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In an MCQ test, a student guesses the correct answer x out of y times. If the probability that the student guesses

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In an MCQ test, a student guesses the correct answer x out of y times. If the probability that the student guesses the answer to be wrong is 2 3 then what is the relation between x and y

(a) y = 3x

(b) x = 3y

(c) 3x = 2y

(d) 2x = 3y

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Correct answer is (a) y = 3x

Explanation: In an MCQ test, a student guesses the correct answer x out of y times. If the probability that the student guesses the answer to be wrong is 2/3 then the relation between x and y is y = 3x.

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