sahil scored 80 marks in a test getting 6 marks for each right answer a d losing 2 marks for each answer. Had 8 marks been awarded for each correct answer and 4 marks been deducted for each wrong answer then sahil would have scored 100 marks . How many questions were there in the test .
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Step-by-step explanation:
Let x be the number of right answers and y be the number of wrong answers.
∴ According to the question ,
3x−y=40⟶(i)
and , 2x−y=25⟶(ii)
On substraction : x=15
putting the value of x in ⟶(i)
3(15)−y=40
y=5
∴ Number of right answers=15 answers
Number of wrong answers=5 answers.
Total Number of questions 5+15=20
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