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9th Class Mathematics Probability Question Bank Probability

  • question_answer
    Card is drawn at random from a pocket of 200 cards numbered 1 to 200. The probability of drawing a number which is a cube is

    A)  1/100                          

    B)  2/100

    C)  1/40        

    D)  3/10

    Correct Answer: C

    Solution :

    (c): \[n\left( S \right)=200,n\left( E \right)=\left\{ {{1}^{3}},{{2}^{3}},{{3}^{3}},{{4}^{3}},{{5}^{3}} \right\}\Rightarrow n\left( E \right)=5.\] \[\therefore n(P)=\frac{n(E)}{n(S)}=\frac{5}{200}=\frac{1}{40}\]                        


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