If a=26, b=25, c=23...............z=1.then what is the value of z+y+x+...........+a=?A. 351B. 531C. 335D. 235

A

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shenbagarani

  • Aug 5th, 2006
 

  using the formula

     Sn=n/2(first term+last term)

        =26/2(1+26)

        =351

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