[機統] 擲骰子觀察到pattern 1,2(連續)
a fair die is tossed n times let X be the number of times that the pattern 1 2
is observed
a. E(X) b. VAR(X)
想很久了 但是還是連怎麼下手都不知道
所以想請教一下板友
謝謝
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