1.

In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 question and secures 125 marks, the number of question he attempted correctly, is – (1) 35 (2) 40 (3) 42 (4) 46

Answer»

Correct option is (2) 40

Let correct = x 

Incorrect = y

∴ x + y = 75 

4x – y = 125

⇒ x = 40



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