Question

In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 75 questions and secures 125 marks then find the total number of questions attempted correctly

Answer 1

Step-by-step explanation:

Let no. of correct answers be x and incorrect answers be y

ATQ

x + y = 75

y = 75 - x ...... (1)

4x - y = 125 ...... (2)

Putting values of 1 in 2

4x - 75 + x = 125

5x = 200

x = 40

y = 35

Hence, total number of questions attempted correctly is 40 questions.