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निम्नलिखित शेणी से लघु रीति द्वारा समान्तर माध्य ज्ञात किजीये ।​

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384 cents Kristensen Ernst
Answer:

In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every incorrect answer. If he attempts all 75 questions and secures 125 marks, what are the number of questions he atémpted correctly?

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Kristensen Ernst
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