In a exam for each correct answer of the question there is 3 marks. For each wrong answer there is -1 marks. If a student solved 110 correct answer and got 286 marks total, then find out how many wrong answers he has done?
In a exam for each correct answer of the question there is 3 marks. For each wrong answer there is -1 marks. If a student solved 110 correct answer and got 286 marks total, then find out how many wrong answers he has done?