Question

In an examination, a candidate scores 2 marks for every correct answer and losses 1 mark for every wrong answer. A candidate attempts all the 100 questions and scores 56 marks. How many questions did he answer correctly ?

Answer 1

Answer:

28

Step-by-step explanation:

56÷2=28

He answered 28 questions out of 100 correct.

Answer 2

let the no of correct ans be x

and no. of wrong ans be y

by Q.

x+y=100

i.e.y=100-x

also, 2x- y =56

i.e. 2x-(100-x)=56

3x-100= 56

3x=156

x=52

so, no of correct ans =52