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9th Class Mathematics Probability Question Bank Probability

  • question_answer
    When two dice are thrown, what is the probability of getting a number always greater than 4 on the second dice?

    A)  \[\frac{1}{6}\]                                  

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

    C)        \[\frac{1}{36}\]                                

    D)         \[\frac{2}{3}\] 

    Correct Answer: B

    Solution :

    \[E=\{(1,5),(3,5),(4,5),(5,5),(6,5),(1,6),\]\[(2,6),(3,6),(4,6),(5,6),(6,6)\}\] \[\Rightarrow \]\[n(E)=12;\,n(S)=6\times 6=36\] \[\therefore \]\[P(E)=\frac{n(E)}{n(S)}=\frac{12}{36}=\frac{1}{3}\]


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