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En un examen 20 alumnos del curso A obtienen una media de 60 puntos y desviacin estndar de 20 puntos. En el curso B los

En un examen 20 alumnos del curso A obtienen una media de 60 puntos y desviacin estndar de 20 puntos. En el curso B los alumnos obtienen una media de 80 y desviacin estndar de 16. Ante unos reclamos se decide subir en 5% ms 5 puntos adicionales a todos los alumnos del curso A, en cambio como hubo muchas copias en el curso B se decidi disminuir la quinta parte de la calificacin. Despus de los mencionados ajustes, el coeficiente de variacin de los 50 alumnos es?

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