數學題,10分....快d呀

Teisha

2007-09-22 7:25 pm

1. 我想問 Without usin a calcualtor , evaluate the follwing expressions. 既題解係咩，姐係ｈｅａｄｉｎｇ!!

2. In a quiz, each of Team A and Team B had to answer 20 questions. They would get 20 marks for correct answer, lose 10 marks for a weong answer and lose 5 marks for no response.
(a) Team A got 4 correct answer and 4 wrong answer. What was its score?

(b) Team B got 6 correct answer and 6 wrong answer. Which team had a higher score: Team A or Team B?

唔該你地,我要過程,因為今次要計分,唔可以錯,唔該哂!!!!

回答 (1)

kwokbun

2007-09-22 7:34 pm

✔ 最佳答案

a)20題A隊答左8題,冇答12題.先扣60分
答中4題得80分
錯左4題扣40分
即是...80-40-60=-20分
b)20題B隊答左12題,冇答8題,扣40分
答中6題得120分
錯左6題扣60分
即是...120-60-40=20分
B隊有20分,A隊-20分.你話邊隊高分d呢.

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