Question

in an examination a student scores 4 marks for every correct answer and losses 1 mark for every wrong answer. if he attempts in all 60 questions and secures 130 marks, the number of questions he attempted correctly is
a) 35 b) 38 c)40 d) 42​

Answer 1

Answer:

b) 38

Step-by-step explanation:

Here is your answer

Let the number of correct answer is x

So the number of wrong answer is 60- x

ATQ

4 \times x - 1 \times (60 - x) = 130 \\ 4x - 60 + x = 130 \\ 4x + x = 130 + 60 \\ 5x = 190 \\ x = \frac{190}{5} \\ x = 38

Hence the number of correct answer is 38

Hope it helps you