New Enroll in RBI Grade B New Batch - Starts on May 21

    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 4 times out of 20 hits, then find the probability of A breaking the bulb.
    A 3/55 Correct Answer Incorrect Answer
    B 4/50 Correct Answer Incorrect Answer
    C 4/55 Correct Answer Incorrect Answer
    D 3/50 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 = 4/20 = 1/5 Probability of A breaking the bulb = (4/11) × (1/5) = 4/55

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