A, B and C in order throw an unbiased coin. The first who throws head wins. Find the respective probabilities of winning

A, B and C in order toss an unbiased coin. The first who throws 'head' wins. Find the respective probabilities of winning.

A and B alternatively toss a fair coin. The first once to throw a head wins. If A starts find their respective probabilities of winning.

A and B alternatively toss a fair coin. The first one to throw a head wins. If A starts, find their respective probabilities of winning.

A, B, and C in order toss a coin. The one to throw a head wins. What are their respective chances of winning assuming that the game may continue indefinitely?

Three persons A, B, C throw a die in succession till one gets a six and wins the game. Find their respectively probabilities of winning.

Two persons A and B throw a coin alternatively till one of them gets head and wins the game. Find their respective probabilities of winning.

Three persons A,B,C throw a die in succession till one gets a six and wins the game. Find their respective probabilities of winning, if A begins.