In a competitive examination ,5 marks are awarded for each correct answer, while 2 marks are deducted for each wrong answer. Jayant answered 120 questions and got 348 marks .How many questions did he answer correctly?
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Answers
Given : ,5 marks are awarded for each correct answer, while 2 marks are deducted for each wrong answer. Jayant answered 120 questions and got 348 marks
To Find : questions he answered correctly
Solution:
Total Questions = 120
Correctly answered = x
Incorrect = 120 - x
Marks for correct answers = 5x
Deduction from incorrect answers = 2(120 - x) = 240 - 2x
Net Marks = 5x - (240 - 2x)
= 7x - 240
7x - 240 = 348
=> 7x = 588
=> x = 84
Correct answers = 84
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