Adam took an exam with 20 questions and answer all of the 20 questions he gets 5 points for right answer and two points taken off for wrong answer if Adam score in the exam is between 45 and 80 exclusive what is the difference between the maximum possible number of right answer M and minimum possible number of right answer m ?
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Assumption that all questions are wright we will get (75*4=300)
Getting marks 125 then these marks are subtracted from 300 then(300–125=175)
If one question wrong we will loose (5 marks)because every wrong answer penality 1 mark and we didn't get 4 marks also if question wrong that's why we loose (5 marks)
Then getting marks are divided by 5 (175/5=35)
Last step total questions -wrong answer questions. (75–35=40)
So that answer will be 40
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