SSC Sample Paper SSC CGL - Sample Paper-7

  • question_answer
    The value of \[{{(0.98)}^{3}}+{{(0.01)}^{3}}+3\times 0.98\times 0.02-1\] is

    A)  1.98                            

    B)  1.09

    C)  1                                

    D)  0

    Correct Answer: D

    Solution :

    Let \[a=0.98,\]\[b=0.01,\]\[c=-1\] But, \[a+b+c=0.98+0.01-1=0\] \[\therefore \]      \[{{a}^{3}}+{{b}^{3}}+{{c}^{3}}-3abc=0\] \[\Rightarrow \] \[{{(0.98)}^{2}}+{{(0.01)}^{2}}-1+3\times 0.98\times 0.02=0\]


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