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 2...
![subject](/tpl/images/cats/ekonomika.png)
Business, 30.07.2021 14:10 haleyturkey
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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