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Mathematics, 17.06.2021 16:20 lilpetals
T m t nhóm 10 k s g m 6 k s hóa và 4 k s đi n ch n ng u nhiên 4 k s (ch n 1 l n). G i X là s k s đi n đ c ch n.Ừ ộ ỹ ư ồ ỹ ư ỹ ư ệ ọ ẫ ỹ ư ọ ầ ọ ố ỹ ư ệ ượ ọa)Tính xác su t đ tronh 4 ký s đ c ch n có đúng 2 k s đi n. Ấ ể ư ượ ọ ỹ ư ệb) Tính EX và VarX. C) L p b ng phân ph i xác su t c a X
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T m t nhóm 10 k s g m 6 k s hóa và 4 k s đi n ch n ng u nhiên 4 k s (ch n 1 l n). G i X là s k s đi...
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