The average of marks obtained by 120candidates was 35. If the avg of marks of passed candidates was 39 & that of failed candidates was 39 and that of failed candidates was 15, the no.of candidates who passed the examination is?  Choose the correct choice from the following:	A) 80	B) 90	C) 100	D) 120	E) 140
Let the number of candidate who passed = y   Then, 39y + 15(120 - y) =120 x 35   ⇒ 24y= 4200 -1800= 
<gadget id="calculator">4200 -1800</gadget>
<output>2_400</output>
2400 / 24= 
<gadget id="calculator">2400 / 24</gadget>
<output>100</output>
100   100
<result>C</result>
The average of marks obtained by 120candidates was 35. If the avg of marks of passed candidates was 39 & that of failed candidates was 39 and that of failed candidates was 15, the no.of candidates who passed the examination is?