A school having three classes only have student strength of 40, 20 and 40 respectively. The pass percentages of these classes are 20%, 30% and 100% respectively. What is the pass percentage for the entire school? Choices.
A) 54%  B) 76%  C) 34%  D) 66%  E) 46%
20% of 40+30% of 20+100% of 40   =8+6+40= 
<gadget id="calculator">8+6+40</gadget>
<output>54</output>
now 54 of 100= 54%   54%NSWER:54%
<result>A</result>
A school having three classes only have student strength of 40, 20 and 40 respectively. The pass percentages of these classes are 20%, 30% and 100% respectively. What is the pass percentage for the entire school?