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Can someone plz solve this sum either by drawing a rook diagram or any other way

the question goes like: There are two teams A and B. The probability of A winning is 50% and the probability of B winning is 40%. These two teams take part in 3 same rounds.

1) What is the probability of A winning all three rounds?

2) What is the probability of the game ending without any winnings or losing

3)What is the probability of the game ending without two winnings or losing

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# Problem in probability

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