Railways Sample Paper RRB (Group D) Sample Test Paper-15

  • question_answer
    The next term of the sequence, \[\left( 1+\frac{1}{2} \right),\,\,\left( 1+\frac{1}{2} \right)\,\,\left( 1+\frac{1}{3} \right),\,\,\left( 1+\frac{1}{2} \right)\,\,\left( 1+\frac{1}{3} \right)\,\,\left( 1+\frac{1}{4} \right),\,\,\_\_\,\,is\]

    A)  3                    

    B)  \[\left( 1+\frac{1}{5} \right)\]

    C)  5                    

    D)  \[\left( 1+\frac{1}{2} \right)\,\,\left( 1+\frac{1}{5} \right)\]

    Correct Answer: A

    Solution :

    [a]  Next term will be \[\left( 1+\frac{1}{2} \right)\,\,\left( 1+\frac{1}{3} \right)\,\,\left( 1+\frac{1}{4} \right)\,\,\left( 1+\frac{1}{5} \right)=\frac{3}{2}\times \frac{4}{3}\times \frac{5}{4}\times \frac{6}{5}=3\]


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