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7th Class Mathematics Data Handling Question Bank Data Handling

  • question_answer
    A bag contains red, white and blue pencils. The probability of selecting a red pencil is \[\frac{2}{13}\]                                 and that of selecting a blue pencil is \[\frac{4}{13}\] . Find the probability of selecting a white pencil.

    A)  \[\frac{6}{13}\]                     

    B)         \[\frac{7}{13}\]                     

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

    D)         \[\frac{2}{5}\]

    Correct Answer: B

    Solution :

    P (white pencil) = Total probability - [P(red pencil) + P(blue pencil)] \[=1-\left[ \frac{2}{13}+\frac{4}{13} \right]=1-\frac{6}{13}=\frac{7}{13}\]


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