→ privatewind :請求出 1<=x1<=x2<=x3<=x4<=x5<=x6<=6 整數解個數... 04/02 22:51
→ vandermonde :不是只有丟四次嗎 所以應該是只有四個吧?1<=X1~X4<=6 04/02 23:10
a fair die is tossed four times in succession
find the probability that the four resulting numbers form a nondecreasing
sequence
請問這題要怎麼解呢?
謝謝
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