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2015-07-25T12:46:43+05:30
86%=559 100%=650 14%=91 students have failed
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2015-07-25T13:01:07+05:30
100------------- 14 %  fail 
 pass  ( 100 - 14 ) 
 = 86
86 --------------------559
1----------------------559/86
14---------------------559 *14 / 86
       
                   =91  fail
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