Three sets of 80, 50 and 60 students appeared for an examination and the pass percentage was 100, 90 and 50 respectively. the pass percentage of the whole set is	Choose the correct choice from the following options
A) 86.57%  B) 89.57%  C) 82.57%  D) 81.97%  E) 81.57%
81.57%xplanation:   total passed student =80+45+30= 
<gadget id="calculator">80+45+30</gadget>
<output>155</output>
155   155 is 81.57% of 190   ANSW81.57%R:81.57%
<result>E</result>
Three sets of 80, 50 and 60 students appeared for an examination and the pass percentage was 100, 90 and 50 respectively. the pass percentage of the whole set is