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Exercice 27
         • Calcul du bénéfice :


                           Bénéfice = Recettes − Coûts
                                B = 250X − 90X − 38 × 4
                                B = 160X − 152

         • Demande moyenne : E(X )


                  E(X ) = 1 × 0, 25 + 2 × 0, 28 + 3 × 0, 15 + 4 × 0, 14
                        = 1, 82

         • Bénéfice moyen :


                         E(B) = 160 · E(X ) − 152
                              = 160 × 1, 82 − 152 = 139, 20

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Ch31 27

  • 1. Exercice 27 • Calcul du bénéfice : Bénéfice = Recettes − Coûts B = 250X − 90X − 38 × 4 B = 160X − 152 • Demande moyenne : E(X ) E(X ) = 1 × 0, 25 + 2 × 0, 28 + 3 × 0, 15 + 4 × 0, 14 = 1, 82 • Bénéfice moyen : E(B) = 160 · E(X ) − 152 = 160 × 1, 82 − 152 = 139, 20