请教一个概率题目# JobHunting - 待字闺中
s*r
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let's say A keep tossing a fair coin, until he get 2 consecutive heads,
define X to be the number of tosses for this process; B keep tossing another fair coin, until he get 3 consecutive heads, define Y to be the number of the tosses for this process.
Calculate P{X>Y}
看到了这个题目, 我只会算出现HH和HHH的需要仍的期望值, 这个就不知道怎么算了
define X to be the number of tosses for this process; B keep tossing another fair coin, until he get 3 consecutive heads, define Y to be the number of the tosses for this process.
Calculate P{X>Y}
看到了这个题目, 我只会算出现HH和HHH的需要仍的期望值, 这个就不知道怎么算了