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Question -

In a competitive examination, one mark is aw awarded for each correct answer while 1/2 mark is deducted for every wrong answer. Jayanti answered 120 questions and got 90 marks. How many questions did she answer correctly. [NCERT Exemplar]



Answer -

Let x be the number of correct answer of the questions in a competitive examination,
then (120 тАУ x) be the number of wrong answers of the questions.
Then, by given condition,
Hence, Jayanti answered correctly 100 questions.

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