10th Class Mathematics Probability Question Bank Case Based (MCQs) - Probability

  • question_answer
    The probability of not drawing a red ball is:

    A) \[\frac{1}{5}\]

    B) \[\frac{2}{5}\]

    C) \[\frac{3}{5}\]

    D) \[\frac{4}{5}\]

    Correct Answer: D

    Solution :

    [d] Number of red balls =5.
    \[\therefore \] Probability of drawing a red ball \[=\frac{5}{25}=\frac{1}{5}.\]
    As \[P(E)+P(\bar{E})=1.\]
    \[\therefore \] Probability of not drawing a red ball
    \[=1-\frac{4}{5}=\frac{4}{5}.\]


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