Three sets of 90, 50 and 70 students appeared for an examination and the pass percentage was 50, 90 and 70 respectively. the pass percentage of the whole set is  Select.
A) 69.19% B) 66.19% C) 66.29% D) 65.19% E) 68.19%
Explanation:   total passed student =45+45+49= 
<gadget id="calculator">45+45+49</gadget>
<output>139</output>
139   139 is 66.19% of210   ANSWER:66.19%
<result>B</result>
Three sets of 90, 50 and 70 students appeared for an examination and the pass percentage was 50, 90 and 70 respectively. the pass percentage of the whole set is