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10th Class Mathematics Probability Question Bank MCQs - Probability

  • question_answer
    A bag contains 5 black balls, 4 white balls and 3 red balls If a ball is selected random wise, the probability that it is a black or red ball is:

    A) \[\frac{1}{3}\]

    B) \[\frac{1}{4}\]

    C) \[\frac{5}{12}\]

    D) \[\frac{2}{3}\]

    Correct Answer: D

    Solution :

    [d] Number of black or red balls \[=\text{5}+\text{3}=\text{8}\]
    \[\therefore \] Required probability \[=\frac{8}{12}=\frac{2}{3}\]


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