Question

In a test, +3 marks are given for correct answer and -1 mark are given for every incorrect answer. Sana attempted all the questions and scored +20 marks though she got 10 correct answers. How many incorrect answer has she attempted ?

Answer 1

Answer:

Here, we are given positive marks for every correct answer and negative marks for every incorrect answer i.e. for the correct answer =+3 and for every incorrect answer =−2 mark. So, the total marks for correct answer = marks for correct answer × number of correct answers.