Question

In an examination one mark is awarded for every correct answer and one fourth marks is deducted for every dog answer a student awarded 120 questions and got 90 marks how many questions did he answer reflect answer correctly

Answer 1

Let x be correctly answered question and y incorrectly
Total question,
x+y=120..........(1)
And total marks are
x-1/4y=90.......(2)
On solving these two equation you will get value of x =96
96 questions were correctly answered and 24 incorrectly answered.