1100 boys and 700 girls are examined in a test; 31% of the boys and 23% of the girls pass. The percentage of the total who failed is ? Choose the correct choice.
A) A)63.3%	B) B)52.4%	C) C)81.2%	D) D)75.4%	E) E)72.11%
Total number of students = 1100+700= 
<gadget id="calculator">1100+700</gadget>
<output>1_800</output>
1800   Number of students passed= (31% of 1100+23% of 700) = 341+161= 
<gadget id="calculator">341+161</gadget>
<output>502</output>
502   number of failures= 1298*100/1800= 72.11%   Answer is 72.11%
<result>E</result>
1100 boys and 700 girls are examined in a test; 31% of the boys and 23% of the girls pass. The percentage of the total who failed is ?