A student losses one mark for every wrong answers and gets two marks for every correct answer. If he scored zero in 90 questions how many questions he attempted correctly?
Answers
Answered by
3
0 is the right answer
Answered by
4
he attempted 30 questions correctly.
pravinkumbharepcnwaa:
how
he answered all wrong answers and for every answer he lost 1 mark
30 correct answer=60. rest 60 wrong answer = -60
please elaborate in simple way
thanks
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