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There are 90 multiple choice questions in a test. Suppose you get two marks for every correct answer and for every question you leaver un attempted or answer wrongly, one mark is deducted from your total score of correct answers. If you get 60 marks in the test, then how may questions did you answer correctly?
Answers
Answered by
30
Answer
The number of question ans correct by 'x'
The number of question answered correctly = 90 - x
Total Marks obtained =60
Marks obtained for correct answer = 22
Marks desucted for wrong answer =
-1 (90-2) = x - 90
2x + 2- 90=60
3x = 150
X = 150/3
X = 50
Therefore the number of question answered correctly is 50
_______________________________
Copy to nhi kiya but i hope it is correct
(◠‿◕)
Answered by
7
The number of question ans correct by 'x'
The number of question answered correctly = 90 - x
Total Marks obtained =60
Marks obtained for correct answer = 22
Marks desucted for wrong answer
= - 1 ( 90 - 2 )
= x - 90
2x + 2 - 90 = 60
3x = 150
X = 150/3
X = 50
Therefore the number of question answered correctly is 50.
______________________________
Hope it helps (≧▽≦)
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