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    Question

    10 defective calculators got mixed with 90 non-defective

    calculators. A student takes one calculator randomly. Find the probability that the calculator is defective.
    A 1/10 Correct Answer Incorrect Answer
    B 1/9 Correct Answer Incorrect Answer
    C 1/11 Correct Answer Incorrect Answer
    D 2/15 Correct Answer Incorrect Answer

    Solution

    Number of defective calculators = 10
    Total number of calculators = 90 + 10 = 100
    Required probability = (10/100) = (1/10)

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