In a test (+5) marks are given for every correct answer and (-2) marks are given for every incorrect answer. Rahul answered all questions and scored 40 marks thought he got 16 correct answer. How many incorrect answer had he attempted?
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Answered by
1
Step-by-step explanation:
Let's assume he have attempted x wrong answers
Therefore, 16*5+(-2)*x=40
Or, x=20
Answered by
11
No. of correct question = 16
Marks scored for correct answer = 16 x 5 = 80
Incorrect questions = 80-40
= 40/2 = 20
No. of incorrect questions = 20
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