In an examination, 20% of total students failed in Hindi, 70% failed in English and 10% in both. The percentage of these who passed in both the subjects is :	Choices.
A) 10%	B) 20%	C) 30%	D) 40%	E) 50%
pass percentage = 100 - (20+70-10) = 100-80= 
<gadget id="calculator">100-80</gadget>
<output>20</output>
20   ANSWER:20%
<result>B</result>
In an examination, 20% of total students failed in Hindi, 70% failed in English and 10% in both. The percentage of these who passed in both the subjects is :