There are 20 multiple choice question in a test.Each question was marked as follows:
Correct answer:=5
Wrong answer:-3
No answer:0
Total mark less than 0 will be regarded as 0.
1)Tom answer all the question but got 7 wrong.What was his total mark?
2)Mary answer all question but only got 4 correct.Whatwas her total marks?
3)Amela answer 15 questions but got 7 wrong.What was her total marks?
4)Ann answer 10 question but only got 4 correct.What was her marks??
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2006-10-15 9:02 pm
回答 (2)
2006-10-15 9:20 pm
✔ 最佳答案
1) answer all questions, 7 wrong i.e. 13 correct, total marks = 13*5 -7*3 = 442) answer all questions, 4 correct i.e. 16 wrong, total marks = 4*5 - 16*3 = -28 i.e. 0
3) answer 15 questions, 7 wrong i.e. 8 correct, total marks = 8*5 - 7*3 = 19
4) answer 10 questions, 4 correct i.e. 6 wrong, total marks = 4*5 - 6*3 = 2
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