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Topic: Niveau quatrième?
Posted by: Licorne at jeu. 06 nov. 2008 12:59:50
Keywords:
Message:

Soit E le nombre d'élèves
F celui de filles
G celui de garçons
L celui de binoclards

E = 30
E = F+G
L = G x 0.5 + F x 0.35
L = E x 0.4

Donc E x 0.4 = (G + F) x 0.35 + G x 0.15
E x 0.05 = G x 0.15
E = G x 3

10 garçons dont 5 à lunettes
20 filles dont 7 à lunettes
12 porteurs de lunettes

Simple système d'équations du premier degré, 4 équations, 4 inconnues.

Licorne.



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