In a class test containing 15 questions ,4 marks are given for every correct answer and (-2) marks are given for every in correct answer (1) Bharti attempt all questions but only 9 answers are correct what is her total score ? (2) One of her friends hema attempts only the 5 questions and all are correct what will be the total score ?
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(1) 9answers are correct, then 15-9=6 are incorrect
marks =9×4 + (-2×6) = 36-12 =24
(2) 5×4=20
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