Question:
Four students completed a quiz. They had to answer as many questions as possible within a given time. 5 points were awarded for each correct answer but 2 points were deducted for each wrong answer. The table shows the number of correct and wrong answers obtained by three of the students.
(a) Which of the three students scored the most number of points? What was the student’s points?
(b) Student D attempted the same number of questions as Student C but obtained 21 points more. how many questions did Student D answer correctly?
Solution:
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