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      Question

      A is trying to break a bulb by throwing balls at it. If

      he hits the bulb 4 times in every 11 throws and bulb breaks 3 times out of 7 hits, then find the probability of A breaking the bulb.
      A 11/67 Correct Answer Incorrect Answer
      B 12/77 Correct Answer Incorrect Answer
      C 10/77 Correct Answer Incorrect Answer
      D 12/75 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Probability of A hitting the bulb = 4/11 Probability of the bulb being broke on getting hit = 3/7 Probability of A breaking the bulb = (4/11) ├Ч (3/7) = 12/77

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