In a class text (+3) marks are given for every correct answer and (-2) marks are given for every incorrect answer and no marks for not attempting any question.
a. Radhika scored 20 marks .If she got 12 correct answers , how many questions has she attempted incorrectly?
b. Mohini scores -5 marks in the test, though she has got 7 correct answers. How many questions has he attempted
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