Smitha answer all questions and scored (- 15) marks , though he got 3 correct answers.how many incorrect answers did she attempt?
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Step-by-step explanation:
let us assume 1 marks is deducted for 1 wrong answer and 1 marks is given for correct answer
correct answer=3
total marks= -15
total marks=correct ans + wrong answer
-15=3+wrong answer
wrong answer =18
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