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[Resolvido]Probabilidade / V. Aleatórias

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The probability of a team A winning any game is 1/2. A plays team B in a tournment. The first team to wins 2 games in a row or a total of three games wins the tournment. Find the expected number of games in this tournment.

Não sei se todos sabem, mas o número esperado (ou esperança) pode ser calculado por:

Ex = Soma de todos os x.f(x)

Sendo x o número de partidas desse torneio e f(x) a probabilidade desse número de partidas ocorrer.

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