Question

28. A question paper consists of 50 questions. Each
correct answer fetches three marks and one mark is
deducted for each wrong answer. A student who
attempted all the questions, scored 90 marks. Find
the number of questions answered by him correctly.
(1) 35 (2) 25 (3) 15 (4) 30
​

Answer 1

35 is the ans............ because 35 questions answered correctly fetches 35×3=105 marks

and remaining 15 questions answered wrong fetches 15×-1=-15 marks

So for a total of 50 questions=105+(-15)=90 marks=Marks scored

Answer 2

Answer:

Step-by-step explanation:

Let

x + y = 50         ( Total Questions).

3x - y = 90        ( Total Marks )

4x = 140

x = 35

∴  x + y = 50

35 + y = 50

y = 50 - 35

y = 150

∴ Correct Answers = 35

INcorrect Answers = 15

So The Option is (1) 35