MATH題目
回答 (5)
2007-06-26 9:45 pm
✔ 最佳答案
雖然你資料不足, 但都可以比兩條公式你. 要找兩個未知數就起碼要兩條公式.問題總數(t) = 答對數目(x) + 答錯數目(y)
得分(m) = 2x + y (注意, 你話答錯都有1分, 如果係扣一分就變成 2x - y)
例 : 40 = x + y ; 44 = 2x + y
計算下, x = 4, y = 36
2007-06-26 13:46:58 補充：
咁o岩, 哈哈~~~
2007-06-26 9:47 pm
Let y be the No. of questions he got correct,
then (40-y) is the No. of questions he got incorrect.
2y-(40-y)=44
3y-40=44
3y=84
y=28
Therefore he answered 28 questions correctly.
then (40-y) is the No. of questions he got incorrect.
2y-(40-y)=44
3y-40=44
3y=84
y=28
Therefore he answered 28 questions correctly.
2007-06-26 9:38 pm
一百減四十四除以二
2007-06-26 9:34 pm
你咁既資料....
只可以話佢答岩既數目一定係雙數/0
最多答岩22題
只可以話佢答岩既數目一定係雙數/0
最多答岩22題
2007-06-26 9:31 pm
啊姐, 你唔講一共有幾多題, 點計呀!!!
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