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In a competitive examination, one mark is 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?
  • a)
    100
  • b)
    95
  • c)
    90
  • d)
    60
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
In a competitive examination, one mark is awarded for each correct an...
Let x be the number of correct answers of the questions in a competitive exam.
Then, 120 − x be the number of wrong answers
Then by given condition
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Most Upvoted Answer
In a competitive examination, one mark is awarded for each correct an...
Understanding the question:
Jayanti answered 120 questions in a competitive examination. She got 90 marks in total. Each correct answer gives her 1 mark, and for every wrong answer, 1/2 mark is deducted.

Calculating correct answers:
Let's assume the number of correct answers Jayanti gave is 'x'.
So, the total number of wrong answers she gave would be 120 - x.
Now, we can calculate her total marks using the given information:
Total marks = (Number of correct answers * 1) - (Number of wrong answers * 1/2)
90 = x - (120 - x) * 1/2
90 = x - 60 + 0.5x
90 = 1.5x - 60
1.5x = 150
x = 100
Therefore, Jayanti answered 100 questions correctly out of the 120 questions she attempted.

Conclusion:
Jayanti answered 100 questions correctly. So, the correct answer is option 'A' - 100.
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In a competitive examination, one mark is 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?a)100b)95c)90d)60Correct answer is option 'A'. Can you explain this answer?
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