ancy wrote an exam in which there are 20 questions each correct answers 5 points will be added for each wrong answers 1 mark will deducted ancy wrote answers for all questions she got 52 points so how many correct answers were there
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Given 20 questions. Each correct answer=5 M, each wrong answer =-1 M
Let she got 'x' answers correct and 'y' answers wrong.
Given,
5*x - y = 52
x + y =20 [since she attended all questions]
Add above 2 equations,
6x = 72
x= 12.
Hence she got '12' answers correct.
Let she got 'x' answers correct and 'y' answers wrong.
Given,
5*x - y = 52
x + y =20 [since she attended all questions]
Add above 2 equations,
6x = 72
x= 12.
Hence she got '12' answers correct.
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