1
姒傜巼璁轰笌鏁扮悊缁熻涔犻鍙婄瓟妗?/p>
涔犻
涓�
4.
璁?/p>
A
锛?/p>
B
涓洪殢鏈轰簨浠讹紝涓?/p>
P
锛?/p>
A
锛?/p>
=0.7,
P
(
A
B
)=0.3
锛屾眰
P
锛?/p>
AB
锛?/p>
.
顎?/p>
銆愯В銆?/p>
P
锛?/p>
AB
锛?/p>
=1
P
锛?/p>
AB
锛?/p>
=1
[
P
(
A
)
P
(
A
B
)]=1
[0.7
0.3]=0.6
6.
璁?/p>
A
锛?/p>
B
锛?/p>
C
涓轰笁浜嬩欢锛屼笖
P
锛?/p>
A
锛?/p>
=
P
锛?/p>
B
锛?/p>
=1/4
锛?/p>
P
锛?/p>
C
锛?/p>
=1/3
涓?/p>
P
锛?/p>
AB
锛?/p>
=
P
锛?/p>
BC
锛?/p>
=0
锛岊�?/p>
P
锛?/p>
AC
锛?/p>
=1/12
锛屾眰
A
锛?/p>
B
锛?/p>
C
鑷冲皯鏈変竴浜嬩欢鍙戠敓鐨勬鐜?/p>
.
顎?/p>
銆愯В銆?/p>
P
锛?/p>
A
鈭?/p>
B
鈭?/p>
C
锛?/p>
=
P
(
A
)+
P
(
B
)+
P
(
C
)
P
(
AB
)
P
(
BC
)
P
(
AC
)+
P
(
ABC
)=
1
4
+
1
4
+
1
3
-
1
12
=
3
4
8.
顎勫涓�涓簲浜哄涔犲皬缁勮�冭檻鐢熸棩闂锛?/p>
锛?/p>
1
锛?/p>
姹備簲涓汉鐨勭敓鏃ラ兘鍦ㄦ槦鏈熸棩鐨勬鐜囷紱
锛?/p>
2
锛?/p>
姹備簲涓汉鐨勭敓鏃ラ兘涓嶅湪鏄熸湡鏃ョ殑姒傜巼锛?/p>
锛?/p>
3
锛?/p>
姹備簲涓汉鐨勭敓鏃?/p>
涓嶉兘鍦ㄦ槦鏈熸棩鐨勬鐜?/p>
.
銆愯В銆?/p>
锛?/p>
1
锛?/p>
璁?/p>
A
1
={
浜斾釜浜虹殑鐢熸棩閮藉湪鏄熸湡鏃?/p>
}
锛屽熀鏈簨浠舵�绘暟涓?/p>
7
5
锛屾湁鍒╀簨浠朵粎
1
涓紝鏁?/p>
P
锛?/p>
A
1
锛?/p>
=
5
1
7
=
锛?/p>
1
7
锛?/p>
锛堜害鍙敤鐙珛鎬ф眰瑙ｏ紝涓嬪悓锛?/p>
锛?/p>
2
锛?/p>
璁?/p>
A
2
={
浜斾釜浜虹敓鏃ラ兘涓嶅湪鏄熸湡鏃?/p>
}
锛屾湁鍒╀簨浠舵暟涓?/p>
6
5
锛屾晠
P
锛?/p>
A
2
锛?/p>
=
5
5
6
7
=(
6
7
)
5
(3)
璁?/p>
A
3
={
浜斾釜浜虹殑鐢熸棩涓嶉兘鍦ㄦ槦鏈熸棩
}
P
锛?/p>
A
3
锛?/p>
=1
P
(
A
1
)=1
(
1
7
)
5
10.
涓�鎵逛骇鍝佸叡
N
浠讹紝鍏朵腑
M
浠舵鍝?/p>
.
浠庝腑闅忔満鍦板彇鍑?/p>
n
浠讹紙
n
<
N
锛?/p>
.
璇曟眰鍏朵腑鎭版湁
m
浠讹紙
m
鈮?/p>
M
锛夋鍝侊紙璁颁负
A
锛夌殑姒傜巼
.
濡傛灉锛氼�勶紙
1
锛?/p>
n
浠舵槸鍚屾椂鍙栧嚭鐨勶紱
锛?/p>
2
锛?/p>
n
浠舵槸鏃犳斁鍥為�愪欢鍙栧嚭鐨勶紱顎勶紙
3
锛?/p>
n
浠舵槸鏈夋斁鍥為�愪欢鍙栧嚭鐨?/p>
.
顎?/p>
銆愯В銆?/p>
锛?/p>
1
锛?/p>
P
锛?/p>
A
锛?/p>
=
C
C
/
C
m
n
m
n
M
N
M
N
飥?/p>
飥?/p>
(2)
鐢变簬鏄棤鏀惧洖閫愪欢鍙栧嚭锛?/p>
鍙敤鎺掑垪娉曡绠?/p>
.
鏍锋湰鐐规�绘暟鏈?/p>
P
n
N
绉嶏紝
n
娆℃娊鍙栦腑鏈?/p>
m
娆′负姝ｅ搧鐨勭粍鍚堟暟涓?/p>
C
m
n
绉?/p>
.
瀵逛簬鍥哄畾鐨勪竴绉嶆鍝佷笌娆″搧鐨勬娊鍙栨搴忥紝
浠?
M
浠舵鍝佷腑鍙?/p>
m
浠剁殑鎺掑垪鏁版湁
P
m
M
绉嶏紝浠?/p>
N
M
浠舵鍝佷腑鍙?/p>
n
m
浠剁殑鎺掑垪鏁颁负
P
n
m
N
M
飥?/p>
飥?/p>
绉嶏紝鏁?/p>
P
锛?/p>
A
锛?/p>
=
C
P
P
P
m
m
n
m
n
M
N
M
n
N
飥?/p>
飥?/p>
鐢变簬鏃犳斁鍥為�愭笎鎶藉彇涔熷彲浠ョ湅鎴愪竴娆″彇鍑猴紝鏁呬笂杩版鐜囦篃鍙啓鎴?/p>
P
锛?/p>
A
锛?/p>
=
C
C
C
m
n
m
M
N
M
n
N
飥?/p>
飥?/p>
鍙互鐪嬪嚭锛岀敤绗簩绉嶆柟娉曠畝渚垮緱澶?/p>
.