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Q.

In a class test (+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.
Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly?


[[1]]


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Detailed Solution

The correct answer is: 8.
Total marks by Radhika=20
Correct answer=12
Total marks for correct answer= marks for correct answer  × No. of correct answers
Total marks for correct answer= 3× 12
Total marks for correct answer= 36 marks
Deductions due to incorrect answers: 20-36=-16
No. of incorrect answers= Deductions due to incorrect answers/-2
No. of incorrect answers= -16/-2
No. of incorrect answers = 8.
 
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In a class test (+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.Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly?[[1]]