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[Matematica]Cipuri

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O fabrica de cipuri creeaza un numar mare de circuite integrate.Doua masini de control sunt creeate pentru a testa circuitele,una pe frecventele de comutare,reflectand 2% cipuri defecte si una pe operatiile semiconductoarelor,reflectand 8% cipuri defecte.Daca una din cele doua masini merge pe un circuit aleator.Care e probabilitatea ca aceasta sa prezinte 2 erori si probabilitatea ca ea sa prezinte cel putin unul din cele 2 defecte.Dati raspunsul sub forma A.AA% - B.BB%

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