17.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
secures 125 marks, the number of questions he attempts correctly, is
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Answer:
40
Step-by-step explanation:
Let the number of correct answers be x
then numbers of incorrect answers will be 75-x
We get 4x-(75-x)= 125
On solving the equation we x= 40
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