s*****r
发帖数: 773 | 1 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 | s*******s
发帖数: 1568 | 2 You can still use Markov chain to calculate this, set the state to be 2
variable truple (X,Y)
another fair coin, until he get 3 consecutive heads, define Y to be the
number of the tosses for this process.
【在 s*****r 的大作中提到】
: 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
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