in NEET exam, vanitha scores 7 marks for every correct answer and loses 3 mark for every wrong answer. if she attempted all 80 questions and secures 120 marks, how many questions does vanitha answer correctly?
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0
Answer:
1 corrct answer=7 marks
attemped question=80
obtained marks=120
Now,
correct anewer=120÷7
=17
Answered by
0
Answer:
36
Step-by-step explanation:
Equation 1 - Based on marks obtained
7X - 3Y = 120
Equation 2 - Based on No of questions
X + Y = 80
7X - 3Y = 120
3X + 3Y = 240 (Equation 2 multiplied by 3, to match with Equation 1)
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10X = 360
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Correct Answer X = 36
Wrong Answer Y = 44
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