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9th Class Mathematics Probability Question Bank Probability

  • question_answer
    A shared garden area has 16 patches owned by 16 different people. The patches are separated by fences as shown. If a patch is selected at random, then what is the possibilities that it has three shared fences?

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

    B)  \[\frac{1}{4}\]             

    C)  \[\frac{1}{2}\]  

    D)  \[\frac{1}{6}\]

    Correct Answer: C

    Solution :

    (c): No. of patches have three shared fences \[=8=n(E)\] Total patches \[=16=n\left( S \right)\] \[n(P)=\frac{n\left( E \right)}{n(S)}=\frac{8}{16}=~\frac{1}{2}\]                        


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