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Mathematics, 30.07.2021 14:20 PaulJames

Cho X là biến ngẫu nhiên rời rạc có bảng phân phối xác suất x 1 2 3 4 5 6 7

P a 2a 2a 3a a² 2a² a(7a + 1)

a. Xác định tham số a.

b. Với a tìm được, tính P(X≥4).

c. Tìm kỳ vọng và phương sai của X.

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Cho X là biến ngẫu nhiên rời rạc có bảng phân phối xác suất x 1 2 3 4 5 6 7

P a 2a 2a 3...
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