.In a test (+3) marks are given for every correct answer and ( -1) marks for incorrect answer. Sona attempted all the questions and scored +20 marks, though she got 10 correct answers. How many incorrect answers had she attempted?
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Answer:
Step-by-step explanation:
as we can see that 3*10= 30
but, the scored marks is +20
that means she got 10 incorrect answer because -1*10=-10
so the answer is 10 incorrect answers
hope it helps
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