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Questions  >>  Olympiad-Math  >>  Class 7  >>  Integers
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In a test (+5) marks are given for every correct answer and (-2) marks are given every incorrect answer. Radhika answered all the questions and scored 30 marks though she got 10 correct answers . How many incorrect answers has she attempted.


( A ) 5
( B ) 10
( C ) 7
( D ) 20

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