in a class test containing 20 questions 6 marks are awarded for every correct and -2 are awarded for every in correct answer and 0 for answer not attempted.
1-Sumit scores 36 mark he got 8 correct answer. how many questions had he attempt incorrectly?
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Answer:
6
let incorrect answers be x
6*8-2x:36
48-:2x:36
48-36:2x
12:2x
6:x
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