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    Question

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

    he hits the bulb 3 times in every 10 throws and bulb breaks 5 times out of 20 hits, then find the probability of A breaking the bulb.
    A 3/42 Correct Answer Incorrect Answer
    B 3/45 Correct Answer Incorrect Answer
    C 3/40 Correct Answer Incorrect Answer
    D 1/20 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Probability of A hitting the bulb = 3/10  Probability of the bulb being broke on getting hit = 5/20 = 1/4 Probability of A breaking the bulb = (3/10) × (1/4) = 3/40

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