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9th Class Mathematics Statistics Question Bank Statistics

  • question_answer
    In a class there are 15 boys and 5 girls. If one child is absent, the probability that it is a boy, is

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

    B)  \[\frac{2}{5}\]

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

    D)  \[\frac{4}{5}\]

    Correct Answer: C

    Solution :

         Probability of boy being absent \[=\frac{15}{15+10}=\frac{15}{25}=\frac{3}{5}\]         


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