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In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks, the number of questions he attempts correctly is
- a)35
- b)40
- c)42
- d)46
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
In an examination, a student scores 4 marks for every correct answer a...
Let the number of questions attempted correctly be X and those attempted wrong be Y.
Given,
Total question attempted= 75
⇒ X + Y = 75 …………………(1)
Also total score is 125. Since 4 marks is awarded for every correct answer and 1 marks is lost for every wrong answer. Thus
⇒(X × 4) +(Y × (-1)) = 125
⇒ 4X – Y = 125 ………………….(2)
Adding (1) and (2) both sides, we get
⇒ 5X = 200
⇒ X = 40
Hence total number of questions attempted correctly is 40.
Most Upvoted Answer
In an examination, a student scores 4 marks for every correct answer a...
Given information:
- The student scores 4 marks for every correct answer.
- The student loses 1 mark for every wrong answer.
- The student attempts all 75 questions.
- The student secures 125 marks.
To find:
The number of questions the student attempts correctly.
Let's assume:
Let the number of questions the student attempts correctly be x.
Calculating the number of questions the student attempts wrongly:
As the student attempts all 75 questions and the number of questions attempted correctly is x, the number of questions attempted wrongly can be calculated as (75 - x).
Calculating the total marks:
The student scores 4 marks for every correct answer, so the total marks obtained from the correct answers is 4x.
The student loses 1 mark for every wrong answer, so the total marks deducted from the wrong answers is (75 - x).
Therefore, the total marks obtained can be calculated as (4x - (75 - x)).
Given:
The student secures 125 marks.
Equation:
(4x - (75 - x)) = 125
Solving the equation:
4x - 75 + x = 125
5x - 75 = 125
5x = 200
x = 40
Conclusion:
The number of questions the student attempts correctly is 40. Therefore, option B is the correct answer.
- The student scores 4 marks for every correct answer.
- The student loses 1 mark for every wrong answer.
- The student attempts all 75 questions.
- The student secures 125 marks.
To find:
The number of questions the student attempts correctly.
Let's assume:
Let the number of questions the student attempts correctly be x.
Calculating the number of questions the student attempts wrongly:
As the student attempts all 75 questions and the number of questions attempted correctly is x, the number of questions attempted wrongly can be calculated as (75 - x).
Calculating the total marks:
The student scores 4 marks for every correct answer, so the total marks obtained from the correct answers is 4x.
The student loses 1 mark for every wrong answer, so the total marks deducted from the wrong answers is (75 - x).
Therefore, the total marks obtained can be calculated as (4x - (75 - x)).
Given:
The student secures 125 marks.
Equation:
(4x - (75 - x)) = 125
Solving the equation:
4x - 75 + x = 125
5x - 75 = 125
5x = 200
x = 40
Conclusion:
The number of questions the student attempts correctly is 40. Therefore, option B is the correct answer.
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In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks, the number of questions he attempts correctly isa)35b)40c)42d)46Correct answer is option 'B'. Can you explain this answer?
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In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks, the number of questions he attempts correctly isa)35b)40c)42d)46Correct answer is option 'B'. Can you explain this answer? for Railways 2025 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks, the number of questions he attempts correctly isa)35b)40c)42d)46Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Railways 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks, the number of questions he attempts correctly isa)35b)40c)42d)46Correct answer is option 'B'. Can you explain this answer?.
In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks, the number of questions he attempts correctly isa)35b)40c)42d)46Correct answer is option 'B'. Can you explain this answer? for Railways 2025 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks, the number of questions he attempts correctly isa)35b)40c)42d)46Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Railways 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks, the number of questions he attempts correctly isa)35b)40c)42d)46Correct answer is option 'B'. Can you explain this answer?.
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