SOLUTION: in a examination one marks is awarded for every correct as and 1/4 marks is deducted for every wrong answer a student answer 120 question and got 90 marks how many question did he
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Question 1035721: in a examination one marks is awarded for every correct as and 1/4 marks is deducted for every wrong answer a student answer 120 question and got 90 marks how many question did he answer correctly
Answer by JBarnum(2146) (Show Source): You can put this solution on YOUR website!
i will use elimination method
multiply by 1
multiply by 4
.
add equations together
divide by 5
96 correct 24 incorrect (24/4=6)
96 marks minus 6 marks =90 marks
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