In an examination, 40% candidates failed in one subject and 30% failed in another subject while 10% failed in both the subjects. If 100 candidates appeared at the end of the examination how many passed in either subject but not in both?	Choose the correct option:
A) 50
B) 75
C) 60
D) 100
E) 40
Failed in 1st subject = 40*100/100= 
<gadget id="calculator">40*100/100</gadget>
<output>40</output>
40   Failed in 2nd subject= 30*100/100= 
<gadget id="calculator">30*100/100</gadget>
<output>30</output>
30   Failed in both= 10*100/100= 
<gadget id="calculator">10*100/100</gadget>
<output>10</output>
10   Failed in 1st subject only= 40-10= 
<gadget id="calculator">40-10</gadget>
<output>30</output>
30   Failed in 2nd subject only= 30-10= 
<gadget id="calculator">30-10</gadget>
<output>20</output>
20   Passed in either subject but not in both= 30+20= 
<gadget id="calculator">30+20</gadget>
<output>50</output>
50   50nswer is 50
<result>A</result>
In an examination, 40% candidates failed in one subject and 30% failed in another subject while 10% failed in both the subjects. If 100 candidates appeared at the end of the examination how many passed in either subject but not in both?