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Three males A,B C tossed a coin one by one. Who gets tail first he will win. If A has first chance, then what is the probability to winning of A.

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Best answer

Prob. to get tail = 1/2

and Pro. to not get tail = 1/2

∵ A toss a coin in first chance thus he may win 1st time, 4th time, 7th time.

∴ Prob. that A win

Similarly prob. that B wins

Similarly prob. that C wins

= 1 - 4/7 - 2/7

= (7 - 6)/7 = 1/7

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