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      Question

      The probability that Ankit fails in Accounts is (2/5),

      and the probability that he does not fail in Economics is (7/10). Find the probability that he fails exactly one subject.
      A 9/25 Correct Answer Incorrect Answer
      B 3/10 Correct Answer Incorrect Answer
      C 11/25 Correct Answer Incorrect Answer
      D 13/25 Correct Answer Incorrect Answer
      E 23/50 Correct Answer Incorrect Answer

      Solution

      Probability that Ankit fails in Economics = 1 - (7/10) = (3/10) Probability that Ankit passes Accounts = 1 - (2/5) = (3/5) Required probability =
      = {(2/5) × (7/10)} + {(3/5) × (3/10)}
      = (14/50) + (9/50)
      = (23/50)

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