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En una urna hay 20 bolas, 15 rojas y el resto blancas. Se elige una bola al azar y se anota si es roja; el

En una urna hay 20 bolas, 15 rojas y el resto blancas. Se elige una bola al azar y se anota si es roja; el proceso se repite, devolviendo la bola, 10 veces.

a. Cual es la probabilidad de seleccionar que salgan 3 bolas rojas

b. Calcular la media y la desviacin tpica

incluir el grafico tambien porfa

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