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Se tiene 13 alumnos, 6 son del economa, 4 son de marketing y los restantes de Matemticas. De este grupo se selecciona al azar a

Se tiene 13 alumnos, 6 son del economa, 4 son de marketing y los restantes de Matemticas. De este grupo se selecciona al azar a 3 estudiantes para formar parte de un comit y se define Las variables aleatorias X Nmero de estudiantes de economa en la muestra, Y Nmero de estudiantes de Marketing en la muestra Z Nmero de estudiantes de Matemticas en la muestra: Determine: 1) La tabla de distribucin conjunta entre X e Y.

2) Calcule la covarianza entre X y Y

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