13. In a test, (+4) marks are given for every correct answer and (-1) mark is given for every incorrect
answer and 0 for unattempted questions
(b) Hari attempted 80 questions out of 100 questions. If he got (-20) marks for incorrect answers, then
find how many questions he attempted correctly and incorrectly. Also, find his score.
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Answer:
right answers by hair= 60
marks given for right answer=60*4= 240
marks given for wroung answer = 20
marks scored by hair = 240-20= 220
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