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 3 times in every 5 throws and bulb breaks 3 times out of 12 hits, then find the probability of A breaking the bulb.
    A 5/20 Correct Answer Incorrect Answer
    B 3/10 Correct Answer Incorrect Answer
    C 3/20 Correct Answer Incorrect Answer
    D 5/21 Correct Answer Incorrect Answer

    Solution

    Probability of A hitting the bulb = 3/5 Probability of the bulb being broke on getting hit = 3/12 = 1/4 Probability of A breaking the bulb = (3/5) × (1/4) = 3/20

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