50 boys and 100 girls are examined in a test; 50% of the boys and 40% of the girls pass. The percentage of the total who failed is ?
Choices.
A) 42.5%	B) 62.1%	C) 56.7%	D) 39.9%	E) 51.4%
Total number of students = 50+100= 
<gadget id="calculator">50+100</gadget>
<output>150</output>
150   Number of students passed= (50% of 50+40% of 100) = 25+40= 
<gadget id="calculator">25+40</gadget>
<output>65</output>
65   number of failures= 85*100/150 = 56.7%   Answer is 56.7%
<result>C</result>
50 boys and 100 girls are examined in a test; 50% of the boys and 40% of the girls pass. The percentage of the total who failed is ?