Question

There are 180 MC queues in a test where four marks for every correct answer and one mark for every wrong answer is assigned a candidate got 450 marks find the number of correct answers

Answer 1

Answer:

126 correct and 54 wrong answers.

Step-by-step explanation:

Let x be the number of correct answers and y be the number of wrong answers. Then given,

x+y=180.

4x-y=450

Solving both, we have x=126, y=54

Answer 2

Answer:

let no of correct answer= x

wrong answer =180- x

4(x) -1(180-x)=450

5x=630

x=126