The probability of guessing the correct answer to a certain question is x/3 . If probability of not guessing the correct answer is 2/3 , then find x.
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Here, probability of guessing the correct answer = x / 2
And probability of not guessing the correct answer = 2 / 3
Now, x / 2 + 2 / 3 = 1
⇒ 3x + 4 = 6
⇒ 3x = 2
⇒ x = 2 / 3
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