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In my tric is that 1.i taken z=8 x=7 so,result is 8>8.5 yes. then i got it z=9.5 x=9 so......... 9.5>9.5 no. in sufficiunt i m rigth or wrong.......????????///

In my tric is that 1.i taken z=8 x=7 so,result is 8>8.5 yes. then i got it z=9.5 x=9 so......... 9.5>9.5 no. in sufficiunt i m rigth or wrong.......????????///

Tina, if x=7, then Z has to be greater than 8.5 (x+10's average)