In a competitive exam,there are 60 question correct answer will carry two marks and for incorrect answer one mark would be deducted Yashwant had attempted all the question and he got total 90 marks then how many answer did he get wrong?
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I think if he do all ques. correctly so he get 120 marks because their is 60 ques. and each carry 2 marks but if he get 90 marks so he attempt 30 marks ques. wrong so he do 15 ques. wrong
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each question carry 2 marks ,
let his all ans are correct hence he scored 2×60=120
but he got 90
hence deduction = 120-90
=30
given 1 wrong ans = 1 marks deducted
hence 1 wrong ans have total deduction = 1 ( deducted) + 2 ( marks of each question)
hecnce each wrong ans give deduction of 3 }marks,
we know total deduction =30
hence nos of wrong ans = 30÷3
= 10 nos questions
let his all ans are correct hence he scored 2×60=120
but he got 90
hence deduction = 120-90
=30
given 1 wrong ans = 1 marks deducted
hence 1 wrong ans have total deduction = 1 ( deducted) + 2 ( marks of each question)
hecnce each wrong ans give deduction of 3 }marks,
we know total deduction =30
hence nos of wrong ans = 30÷3
= 10 nos questions
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