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LE 4 PENNE
Carla dice a Milena:"se mi dai 4 penne, io ne avrò il doppio di te. Ma se te ne do 4, sarai tu ad averne il doppio di me"
QUANTE PENNE HANNO INSIEME CARLA E MILENA?
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In teoria credo siano 12 le penne totali. Devo capire in che modo vengono distribuite
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no, in tot sono 24 le penne.
12 le ha carla e 12 le ha milena
perche 12 +4 =16 mentre 12-4=8 e viceversa
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In quanti modi una persona può invitare un sottoinsieme non vuoto di suoi 10 amici a cena?
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10-11-2012, 06:55 AM
(This post was last modified: 10-11-2012, 07:00 AM by Verginella.)
penso che siano 1023 i modi, se ho ragione vi spiego il procedimento
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Me lo spieghi anche se non hai ragione ? sono curioso xD
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10-11-2012, 08:18 AM
(This post was last modified: 10-11-2012, 08:19 AM by [GF]Acqua.)
2^10 - 1 (nessun invitato) = 1023 è giusto
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non ho capito una mazza