1
1
涔犻绛旀
绗?/p>
1
绔?/p>
涓夈�佽В绛旈
1
锛庤
P
(
AB
) = 0
锛屽垯涓嬪垪璇存硶鍝簺鏄纭殑锛?/p>
(1)
A
鍜?/p>
B
涓嶇浉瀹癸紱
(2)
A
鍜?/p>
B
鐩稿锛?/p>
(3)
AB
鏄笉鍙兘浜嬩欢锛?/p>
(4)
AB
涓嶄竴瀹氭槸涓嶅彲鑳戒簨浠讹紱
(5)
P
(
A
) = 0
鎴?/p>
P
(
B
) = 0
(6)
P
(
A
鈥?/p>
B
) =
P
(
A
)
瑙ｏ細
(4) (6)
姝ｇ‘
.
2
锛庤
A
锛?/p>
B
鏄袱浜嬩欢锛屼笖
P
(
A
) = 0.6
锛?/p>
P
(
B
) = 0.7
锛岄棶锛?/p>
(1)
鍦ㄤ粈涔堟潯浠朵笅
P
(
AB
)
鍙栧埌鏈�澶у�硷紝鏈�澶у�兼槸澶氬皯锛?/p>
(2)
鍦ㄤ粈涔堟潯浠朵笅
P
(
AB
)
鍙栧埌鏈�灏忓�硷紝鏈�灏忓�兼槸澶氬皯锛?/p>
瑙ｏ細鍥犱负
)
(
)
(
)
(
)
(
B
A
P
B
P
A
P
AB
P
飦?/p>
飥?/p>
飥?/p>
飩?/p>
锛?/p>
鍙堝洜涓?/p>
)
(
)
(
B
A
P
B
P
飦?/p>
飩?/p>
鍗?/p>
.
0
)
(
)
(
飩?/p>
飥?/p>
B
A
P
B
P
飦?/p>
鎵�浠?/p>
(1)
褰?/p>
)
(
)
(
B
A
P
B
P
飦?/p>
飥?/p>
鏃?/p>
P
(
AB
)
鍙栧埌鏈�澶у�硷紝鏈�澶у�兼槸
)
(
)
(
A
P
AB
P
飥?/p>
=0.6.
(2)
1
)
(
飥?/p>
B
A
P
飦?/p>
鏃?/p>
P
(
AB
)
鍙栧埌鏈�灏忓�硷紝鏈�灏忓�兼槸
P
(
AB
)=0.6+0.7-1=0.3.
3
锛庡凡鐭ヤ簨浠?/p>
A
锛?/p>
B
婊¤冻
)
(
)
(
B
A
P
AB
P
飥?/p>
锛岃
P
(
A
) =
p
锛岃瘯姹?/p>
P
(
B
)
锛?/p>
瑙ｏ細鍥犱负
)
(
)
(
B
A
P
AB
P
飥?/p>
锛?/p>
鍗?/p>
)
(
)
(
)
(
1
)
(
1
)
(
)
(
AB
P
B
P
A
P
B
A
P
B
A
P
AB
P
飥?/p>
飥?/p>
飥?/p>
飥?/p>
飥?/p>
飥?/p>
飥?/p>
飦?/p>
飦?/p>
锛?/p>
鎵�浠?/p>
.
1
)
(
1
)
(
p
A
P
B
P
飥?/p>
飥?/p>
飥?/p>
飥?/p>
4
锛庡凡鐭?/p>
P
(
A
) = 0.7
锛?/p>
P
(
A
鈥?/p>
B
) = 0.3
锛岃瘯姹?/p>
)
(
AB
P
锛?/p>
瑙ｏ細鍥犱负
P
(
A
鈥?/p>
B
) = 0.3
锛屾墍浠?/p>
P
(
A
)
鈥?/p>
P(
AB
) = 0.3,
P(
AB
) =
P
(
A
)
鈥?/p>
0.3,
鍙堝洜涓?/p>
P
(
A
) = 0.7
锛屾墍浠?/p>
P(
AB
) =0
.
7
鈥?/p>
0.3=0.4
锛?/p>
6
.
0
)
(
1
)
(
飥?/p>
飥?/p>
飥?/p>
AB
P
AB
P
.
5
锛?/p>
浠?/p>
5
鍙屼笉鍚岀殑闉嬪瓙绉嶄换鍙?/p>
4
鍙紝闂繖
4
鍙瀷瀛愪腑鑷冲皯鏈変袱鍙厤鎴愪竴鍙岀殑姒傜巼鏄灏戯紵
瑙ｏ細鏄剧劧鎬诲彇娉曟湁
4
10
C
n
飥?/p>
绉嶏紝浠ヤ笅姹傝嚦灏戞湁涓ゅ彧閰嶆垚涓�鍙岀殑鍙栨硶
k
锛?/p>
娉曚竴锛氬垎涓ょ鎯呭喌鑰冭檻锛?/p>
1
5
C
k
飥?/p>
2
4
C
2
1
2
)
(
C
+
2
5
C
鍏朵腑锛?/p>
2
1
2
2
4
1
5
)
(
C
C
C
涓烘伆鏈?/p>
1
鍙岄厤瀵圭殑鏂规硶鏁?/p>
娉曚簩锛氬垎涓ょ鎯呭喌鑰冭檻锛?/p>
!
2
1
6
1
8
1
5
C
C
C
k
飪?/p>
飪?/p>
飥?/p>
+
2
5
C
鍏朵腑锛?/p>
!
2
1
6
1
8
1
5
C
C
C
飪?/p>
飪?
涓烘伆鏈?/p>
1
鍙岄厤瀵圭殑鏂规硶鏁?/p>
娉曚笁锛氬垎涓ょ鎯呭喌鑰冭檻锛?/p>
)
(
1
4
2
8
1
5
C
C
C
k
飥?/p>
飥?/p>
+
2
5
C
鍏朵腑锛?/p>
)
(
1
4
2
8
1
5
C
C
C
飥?/p>
涓烘伆鏈?/p>
1
鍙岄厤瀵圭殑鏂规硶鏁?/p>