Question 1095782

in competiative examination, there were 60 questions, the correct answer would carry 2 marks and for incorrect 1 mark would be subtracted. yash had attempted all the questions and he got total 90 marks. then how many questions he got wrong? 
<pre>Let number of wrong answers be W
The number of correct answers = 60 - W
We then get the following equation: - 1(W) + 2(60 - W) = 90
Solve this for W, or the number of wrong answers. You should get 10.
That's all. Nothing COMPLEX and/or CONFUSING.