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10th Class Mathematics Probability Question Bank MCQs - Probability

  • question_answer
    A box contains 30 chocolates in all out of which some are milk chocolates and the remaining are coco chocolates. One chocolate is taken out at random from the box and the probability that it is a milk chocolate is -, then the number coco chocolates in the box is:

    A) 10

    B) 20

    C) 30

    D) 15

    Correct Answer: A

    Solution :

    [a] Let the number of milk chocolates be x.
    Then,\[\frac{2}{3}=\frac{x}{30}\Rightarrow \,\,x=20\]
    \[\therefore \]  Number of coco chocolates
    \[=30-20=10.\]


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