解:
(X-5)= (1-4) (213) (31²) (411)
Pix=5) =
V
36
Lang
9
21
Alt
最多,最低2.
6x6=36.
(66)
演練2 擲一個公正骰子2次,設隨機變數X表示投擲二次出現的點數和,試求:
(1) P(X=5)°3
7.
(2) P(6<X≤9)。
4 Home
4
=
6
36
(X=)) = (116) (215) (314) (4,3) (512) (611)
(X= 8) = (1¹5) (216)) (45)
(X= 9) = (1.8) (215) (316) (415) (54)
+
33°0′ 1-1隨機變數
▲ Pg Up
▾ Pg Dn
P(6 < x≤ 91 = P(X= 2) + P(x = 8) + P(x=9)
S
5.
36
+
4
36
End >>>
(62)) (31)
(63) (7²) (81)
15
36
C
5
|>
