In an examination, 35% of total students failed in Hindi, 45% failed in English and 20% in both. The percentage of these who passed in both the subjects is :	Choices.
A) 10 %  B) 20 %  C) 30 %  D) 40 %  E) 50 %

Rationale: "pass percentage = 100 - ( 35 + 45 - 20 ) = 100 - 60 = 40 answer : d"
Answer: D