Question

there are 90 multiple choice questions in a test suppose you get 2 marks for every correct answer and for every question you leave attempted or answer wrong only one mark is deducted from your total score of correct answers .if you got 60 marks in the test how many questions to answer correctly?​

Answer 1

let incorrect questions=x
then correct questions=(90-x)
so 2(90-x)-1*x=60
so 180-2x-x=60
180-3x=60
so x=40
so correct answers are 90-40=50 questions
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