Can you calculate how many answers given by you were wrong ? In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam. When you checked the result, you had scored 125 marks in the test.

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Answers

2015-11-15T13:28:35+05:30

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SUPPOSE A= RIGHT ANSWER AND B= WRONG ANSWER
20=A+B
A= +10
B= -5
10A+ (20-A) (-5) = 125
15A=125+100
A=15
SO B=5
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