A school having four classes only have student strength of 10, 50, 30 and 10 respectively. The pass percentages of these classes are 20%, 30%, 60% and 100% respectively. What is the pass percentage for the entire school?
Select the correct option:
A) 56%
B) 76%
C) 34%
D) 66%
E) 45%
20% of 10+30% of 50+60% of 30+100% of 10   =2+15+18+10= 
<gadget id="calculator">2+15+18+10</gadget>
<output>45</output>
now 45 of 100= 45%   ANSW45%R:45%
<result>E</result>
A school having four classes only have student strength of 10, 50, 30 and 10 respectively. The pass percentages of these classes are 20%, 30%, 60% and 100% respectively. What is the pass percentage for the entire school?