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10th Class Mathematics Probability Question Bank MCQs - Probability

  • question_answer
    The probability of getting a defective bulb in a lot of 500 bulbs is 0.290. Then, the number of defective bulbs in the lot is

    A) 140

    B) 145

    C) 50

    D) 100

    Correct Answer: B

    Solution :

    Let the number of defective bulbs = x Probability of getting a defective bulb \[=\frac{x}{500}\] According to question, \[\frac{x}{500}=0.290\] \[\Rightarrow \,\,x=0.290\times 500=145\]


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