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Topic: Au secours les matheux !
Posted by: Bouclier at mer. 23 mars 2011 22:04:56
Keywords:
Message:

Putain je n'y arrive plus, je suis trop con trop vieux ou trop fatigué.

Quelle est la probabilité quand on lance 10 pieces d'obtenir X piles ? Pouvez vous me filer le calcul svp.
la proba d'avoir que des piles c'est 1/(2puissance 10)

J'ai essayé la formule chance d'avoir X pile = 1/(2puis10)+ 1/2(puis9)+.... x fois en decrementant à chance fois mais la somme des 10 lignes ne fait pas 1 mais 1,98. Donc c'est pas po ca.


Bou



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