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Railways Sample Paper RRB (Group D) Sample Test Paper-2

  • question_answer
    \[If\,\,x*y={{(x+3)}^{2}}\,\,(y-\,1),\,\,then\,\,the\,\,value\,\,of\,\,5*4\,\,is\]

    A)  192                 

    B)  182

    C)  \[\sqrt{2}\]                   

    D)  356

    Correct Answer: C

    Solution :

    [c] \[x*y={{(x+3)}^{2}}\,\,(y-1)\]. \[\therefore \,\,5*4={{(5+3)}^{2}}\,\,(4-1)\] \[=64\times 3=192\]


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