Question

If three masses are granted for correct answer and one mark is deducted for wrong answer then sagar has got 78 marks for 50 questions how many questions were wrong

Answer 1

There are 50 questions.

Total marks he would have 150 if all correct.

if he got 1 wrong,there were 4 marks reduced to him.

so we just calculate multiples of 4 with which he got 78.

150-72 = 78

∴ in 72 we have 18 4's , so the answer is 18 wrong

Answer 2

Refer to the attachment please