Question 108

In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. A student attempted tempted all the 200 questions and scored, in all 200 marks. The number of questions, he answered correctly was

Solution

let's say student attempt $$x$$ correct questions
hence total marks will be $$x \times 4$$ + $$( (200-x) \times (-1) )$$ = 200
$$x$$ = 80

Create a FREE account and get: