A test has 60 questions. For each correct answer 2 marks are awarded and each wrong answer 1 mark is deducted. A candidate attempted all the questions in the test and scored 90 marks. Find the number of questions he attempted correctly. The options are: 54,48,49,50.
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Answer:Let the number of questions attempted correctly by the candidate = C
He attempted all the questions
∴ Number of questions attempted wrongly by him =60−C
2C−1(60−C)=90
2C−60+C=90
C=50
Step-by-step explanation:
Answered by
1
Answer:
2C−1(60−C)=90
2C−60+C=90
C=50
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