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Sulakshina and Sunayana tossed a coin one by one. Who get tail first she will win. If Sulakshina has first chance, then find probability that both of them win.

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Best answer

Prob. to get.tail = 1/2

and prob. to not get tail = 1/2

∵ Since first, sulakshina toss a coin

Thus, she may win in 1st, 3rd, 5th attempt

∴ Probability that Sulakshina wins

and probability that sunayana wins

= 1 - 2/3 = 1/3

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