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 questions and secure 125 marks, the number of questions be attempted correctly, is​

Answer»

ong>Answer:

40

Step-by-step EXPLANATION:

If the NUMBER of correct answer be X, then

the number of incorrect answer is (75x).

∴4x−(75−x)=125orx=40



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