the headless horseman!
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If you mean 1: head 2:tail 3:head the probability is 1/2 x 1/2 x 1/2 = 1/8. If you mean only that you want the heads and tails to alternate, that is, you mean the above or tail, head , tail, the probability is 1/8 + 1/8 = 1/4.
2
This is a Probability question P(head) = 1/2 = 0.5 P(tail) = 1/2 = 0.5 Reason . when flippimng a coin it can only come down on one of two sides, viz, the head side or the tail side.
1/2. There is an equal chance of the coin falling head up or tail up.
First, cut off 1 tail and 2 replace it. Next, cut off 2 tails and a head grows in. Then, cut off 2 heads and then 2 more and then there are no heads but 2 tails. After that, cut off 1 tail and 2 replace it. Next, chop off 2 tails and a new head grows in. Then, cut off 1 tail and 2 replace it. After that, chop off 2 tails and a head grows. Finally, cut off your last 2 heads and you are left with nothing but a dead drogon.