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UBA - CienciaS :: Ver Tema - Ejercicio 2 - Combinatoria - Primer parcial 22/05/10
UBA - CienciaS
http://ubacs.com.ar/ubacs/

Ejercicio 2 - Combinatoria - Primer parcial 22/05/10
http://ubacs.com.ar/ubacs/viewtopic.php?f=28&t=1990
Página 1 de 1

Autor:  dacho [ 22 May 2010, 21:05 ]
Asunto:  Ejercicio 2 - Combinatoria - Primer parcial 22/05/10

Hola gente llegue hace unr ato de rendir y subo uno de los ejercicios a ver si esta bien lo que hice o si es un desastre atomico xD...

Ejercicio 2: ¿Cuantos numeros de 7 digitos hay que sean simultaneamente multiplos de 5 y 8?



Espero que este bien :)

Autor:  Eliana [ 23 May 2010, 12:44 ]
Asunto:  Re: Ejercicio 2 - Combinatoria - Primer parcial 22/05/10

En mi tema decía que los números NO se podían repetir, ergo, overcounting...

Autor:  Mike [ 26 May 2010, 18:56 ]
Asunto:  Re: Ejercicio 2 - Combinatoria - Primer parcial 22/05/10

Claro.
Ademas para que un número sea divisible por 8 es necesario que las tres últimas cifras sean divisibles por 8: o sea un número que termina en 40 no siempre es divisible por 8, ejemplo: 3247540 no es divisible por 8.
Y dentro de los casos que pusiste, la consigna decía que no podían repetirse los dígitos, o sea que no tendras los casos que terminan en: 000, 880, 800, 600, 440 y demás.

Autor:  Roprgm [ 26 May 2010, 22:12 ]
Asunto:  Re: Ejercicio 2 - Combinatoria - Primer parcial 22/05/10

¿Cuántos números de 7 dígitos distintos son divisibles por 8 y 5?


Autor:  Mike [ 29 May 2010, 14:42 ]
Asunto:  Re: Ejercicio 2 - Combinatoria - Primer parcial 22/05/10

En mi tema se pedían numeros de 8 cifras distintas.

Dos posibles resoluciones estan en:

viewtopic.php?f=15&t=1992

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