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 10 throws and bulb breaks 3 times out of 20 hits, then find the probability of A breaking the bulb.
    A 1/50 Correct Answer Incorrect Answer
    B 2/21 Correct Answer Incorrect Answer
    C 3/50 Correct Answer Incorrect Answer
    D 1/25 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Probability of A hitting the bulb = 4/10 = 2/5 Probability of the bulb being broke on getting hit = 3/20 Probability of A breaking the bulb = (2/5) × (3/20) = 3/50

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