Question
In a competitive examination containing 200 questions, 2
marks are awarded for every correct answer and 1 mark gets deducted for every wrong answer. If a student attempted all questions and obtained 97 marks, how many wrong answers must he have given?Solution
Let number of questions with right answers = x ∴ No. of questions with wrong answers = 200 – x ∴ Marks obtained for right answers = 2x ∴ Marks deducted for wrong answers = 200 – x ∴ 2x - (200 – x) = 97⇒ 3x = 200 + 97 ⇒ 3x = 297 ∴ x = 99 ∴ No. of questions with wrong answers (200 – 99) = 101
In the following question, select the missing number of the given series.
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In a certain coding system, ‘matter occupies anything’ is coded as ‘395’, ‘that occupies space’ is coded as ‘941’ and ‘that matter req...
Looking at a family photo, F pointed to A and said, “She is my sister G’s father D’s sister E’s father B’s wife”. How is B related to F?
In a code language, ‘wake up early’ is coded as ‘126’. ‘early healthy meal’ is coded as ‘869’ and ‘meal low up’ is coded as ‘293�...
Question : Answer :: Problem : ?
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To whom M is married?
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NQLM, OSMO, PUNQ, QWOS, ?
Select the figure that will replace the question mark (?) in the following figure series.
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