Question

Raj scored 140 marks in a test getting 3 marks for each right answer and losing 1 mark for each wrong answer, had 4 marks been awarded for each correct answer and 2 marks been deducted for each incorrect answer, then Raj would have scored 170 marks. How many question were there in the test?

A 80
B 72
C 91
D 68
E None of these
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