Question: Un ge610ga recolect6 20 especimenes de roca basltica y 25 especfmenes de granito. Ella le pide a Su ayudante de laboratorio que seleccione al

Un ge610ga recolect6 20 especimenes de roca basltica y 25 especfmenes de

Un ge610ga recolect6 20 especimenes de roca basltica y 25 especfmenes de granito. Ella le pide a Su ayudante de laboratorio que seleccione al azar 15 de IOS especimenes para analizarlos. (a) (4 puntos) es la probabilidad de que todos IOS especfmenes de uno de IOS dos tipos de roca sean seleccionados para su anlisis? (b) (4 puntos) es la probabilidad de que el nmero de especimenes de granito seleccio- nados para analizarlos est dentro de una desviaci6n estndar de su valor medio?

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