in a class test containg 10question'3'marks are awarded for every correct answer and (-1) mark is
(i) gopi gets correct and 5 incorrect answer. what is his score
(ii) reshma gets 7 correct answer and 3 incorrect answers. what is his score
(iii) rashmi gets 3 correct and 4 incorrect answers out of seven questions she attempts.
what is her score
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