[問題] 機率
An urn contains one white and two black balls.
A ball is drawn at random and is returned to the urn together
with one ball of the same color as that drawn.
This procedure is performed repeatedly.
Let Ai be the event that the ith ball drawn is black,where i=1,2...
(a)Find P(Ai)
(b)Find P(Ai交集Aj),for i 不等於 j
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題目意思看不太懂
有人可以幫我解答嗎??
感謝~~
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