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In an Examination a student scores four marks for every correct answer and loses one mark for every wrong answer. If he attempts all 75 questions and secures 125 marks. The number of questions he attempt correctly is.

A35

B40

C82

D46

Answer:

B. 40

Read Explanation:

Let the number of correct answer be x No of incorrect answer = 75 - x 4x - (75 - x) = 125 5x = 200 x = 40


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