Isha took a test. Each question in the test carried (+4) marks for the correct answer and (-2) marks for the wrong one. Isha answered 10 questions correctly, but scored 10 marks in total. Find the number of questions that Isha answered incorrectly, if she attempted all the questions.
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1 questions marks = 4 marks
so....
as she answered 10 question so
1 question = 4 marks
so 10 questions = 40 marks
so if she answerd all the answers correctly her marks will be 40 as 4×10 =40 so
40 marks
as it's written in questions that she has got 10 marks
and 1 wrong answer = -2 so as a result we have to obtain 40-30 to obtain 10 marks
and if 30 marks are deducted so no of questions wrong
= 30÷2=15
answers = 15 answers incorrect
mark as brainliest please
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