Question 10 P, Q and R gave an online exam that had 15 questions.
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P, Q and R gave an online exam that had 15 questions. For a correct answer 4 marks were given, for an incorrect answer 2 marks were deducted and for a skipped question 1 mark was deducted. The topper among them got 40 marks. Q and R had the same number of correct attempts and R attempted all the questions. The number of incorrect attempts by R was equal to the number of skipped questions by P who had 5 correct attempts. The average marks obtained by Q and R was 31. How many questions were skipped by the three of them together?
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Rigorous quantitative and aptitude evaluation.
Step-by-step Derivation:
Step 1: Formulate algebraic equations.
Step 2: Solve step-by-step.
Step 3: Match with correct option.