there are 30 objective type question in an examination. for every correct answer a student scores 5 marks and for every incorrect answer 3 marks are deducted. if a student attempts all the questions and scores 94 marks find how many questions he answered correctly.
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Total. No. Of ques=30
Total. No. 150
no. the correct answer
90/5
=18
And 12 ques wrong
Then,
12/3=4
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