[計量] math jj no73, no151
73.a group of 3 of battery containers each contain 6 batteries
要go through a inspection of 200 such containers, with 3 containers each
have one bad battery,while others contain no bad battery,問fraction of
bad batteries over inspected batteries.
請問一下各位要怎麼算出400分之1這答案？感覺上不太難
但實在有點看不懂題目！
151 正整數 x>/4-x/，問條件？
解答給x>2，但我算是2<x<4，請問各位先進算的結果如何？
不好意思還有no129，請問一下答案是D嗎，因為原PO寫B
可是底下的解答沒說真正答案是什麼，我覺得好像是D(因為條件1感覺很充分)
各位覺得呢？
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