There are 180 multiple choice questions in a test. A candidate gets 4 marks for every correct answer, and for every un-attempted or wrongly answered questions one mark is deducted from the total score of correct answers. If a candidate scored 450 marks in the test how many questions did he answer correctly?

1

Answers

2015-06-26T18:12:30+05:30
Let correct answers be x and wrong answers be y. x+y=180\\
4x-1y=450\\
5x=630\\
x=126\\
so the correct answers were 126
3 1 3