Elementary outcome - PowerPoint PPT Presentation

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Elementary outcome

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Title: 5 Author: print Created Date: 9/28/1999 2:08:59 PM Document presentation format: Company: mis Other titles: Times New Roman ... – PowerPoint PPT presentation

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Title: Elementary outcome


1
???
  • ???

2
?????????
  • Elementary outcome
  • ????????????

????(Sample space) ?????,?????????
?? (Event) ?????????
3
  • 0!1 3!321 5!54321
  • 100!1009998..321
  • N!N(N-1)(N-2)(N-3).321
  • ????
  • Ex ???3????,5????,?
  • 20???. ?????????? ???
  • Ex ??????7???,3???,5??????,?2?????????.
    ?????????????

4
??????2??????
??? ??? ????
? ?
R2
(R1,R2)
P(R1 R2)7/106/9
R1
P(R2/R1)6/9
W2
P(R1)7/10
(R1,W2)
P(R1 W2)7/103/9
P(W2/R1)3/9
R2
(W1,R2)
P(W1 R2)3/107/9
W1
P(R2/W1)7/9
W2
(W1,W2)
P(W1 W2)3/102/9
P(W1)3/10
P(W2/W1)2/9
5
???????,????36
? ? ?
1 2 3 4
5 6
1 2 3 4 5 6
(1,1) (1,2) (1,3) (1,4)
(1,5) (1,6)
? ? ?
(2,1) (2,2) (2,3) (2,4)
(2,5) (2,6)
(3,1) (3,2) (3,3) (3,4)
(3,5) (3,6)
(4,1) (4,2) (4,3) (4,4)
(4,5) (4,6)
(5,1) (5,2) (5,3) (5,4)
(5,5) (5,6)
(6,1) (6,2) (6,3) (6,4)
(6,5) (6,6)
6
???????
  • ??(Permutation)
  • ?n??????,??????r???
  • ??(Combination)
  • ?n??????,?????,????
  • r??????
  • C

(n-r)!
n
n!
Pr
n!
n r
r!(n-r)!
7
  • Ex ???30????,??????
  • ?20?????,??????
  • ??20???????????
  • Sol
  • n30 r20
  • P

30! 30! (30-20)! 10!

30
20
302928.321 1098321
8
  • Ex
  • 7-11??????30????????,?????????????,???????????,?
    ?????????
  • C

30! 30! 12!(30-12)!
12!18!
30 12
302928.19 121110.321
9
  • Ex ?????200???, ????5???????,????????
  • Ex?????200???, ????5???????, ???????????,????????
    ????,????? ????????,?????????????,?????????????.??
    ????????

10
???????
  • ???????

N???????
???????
lim
n(E)??E????? n????????
???????
P(E)???E?????
11
???????

????A??????? ????????
P(A)
12
  • Ex ??2???????????
  • ?8??????
  • Sol
  • ??(E)(2,6) (6,2) (3,5) (5,3) (4, 4)
  • P(E)
  • ??????2,3,4,5,6,7,9,10,11,12,13??????

13
????
  • ??????B???????A???,????A?????

14
  • Ex
  • ????3???,???????????,?????2?????????
  • Ans
  • ???????
  • SBBB,GGG,BBG,BGB,GBB,BGG,GBG
  • GGB n(S)8
  • ???????, n(S)7
  • P(2??? ?????)

15
????
  • ????????????????

????
?????????????????,???????????????
16
  • Ex ?????100??????????,
  • ????

???? ????? ?? 64
2 ?? 21 13

????????????? P(??
????)64/100 ?????????????? P(??
?????)13/100
17
  • ???? ????? ??
  • ?? 64 2
    66
  • ?? 21 13
    34
  • ???????????????
  • P(?????) n(?? ???)

  • n(??)
  • 21/34


18
  • ???? ????? ??
  • ?? 64 2
    66
  • ?? 21 13
    34

?????????????? ????????? P(????)P(????
???) P(???????)
64/10021/10085/100 P(?????) 15/100
19
????????
  • ?????
  • ?A?B????????????,?A ?B????

20
????????
  • ????
  • ???????????????????????
  • ????
  • ???????????
  • (???)

21
  • Ex ???????????, ????????
  • (a) P(???)?
  • (b) P(??)?
  • (c) P (??????)?
  • (d) P(??????A)?
  • (e) P(??????)?
  • ????????, P(????A)?
  • P(????A)?
  • P(????A????A)?

22
Ex ?????,??10???????,7???, 3???
??,??????2?.??,????,???????? ??????(Tree
Diagram)
23
??B?????,?A???P(A B)
n(s)
n(A B)
n(A B)
P(A B)


n(s)
n(B)
n(B)
n(s)
n(A B)


n(s)
n(B)
P(A B)

P(B)
? ? ? ?
or
P(A B)
P(B)
P(A B)


? ? ? ?
24
n(A B)
????
P(A B)
n(B)
(??)
n(S)
n(A B)


n(B)
n(S)
n(S)
n(A B)


n(S)
n(B)
P(A B)
n(A B)
n(B)

/

P(B)
n(S)
n(S)
P(A)
P(B)



P(A)
P(B)
25
?????3000???,???2000?
?1000?,?????600?,?????50?
Sex Smoke Non-Smoke total
F 50 950 1000

M 600 1400 2000
_at_????????30,?????5???,??????????????????or?,????
???????
26
P(A B1)
P(B1
A)

P(A)
P(A)P(A
B1)

P(B1)P(A B1)P(B2)P(A B2)
A
B1
B2
27
2000
2
P(M)

(????,??????)
3000
3
?????
P(M S) (??)
???????0.3
P(S M)0.3
P(M S)
P(S M) P(M)

P(S M)

P(S)
P(M S)P(F S)
P(S M) P(M)

0.3?


P(S M)P(M)P(S F)P(F)
0.3?0.05?
28
? ? ? ? ??????????????, ?????????
P(A) P(B A)
P(A B)
P(A)P(B A)P(C)P(B C)
A,C???? ,P(A)????
P(A B) ,P(C B)????
29
????
30
? ? ? ? ? ? (5?1)
? ? ? ?0.4, ? ? ?,? ? ?
? ? ? ? 1/5
? ? ? ? ? ?(??)
? ?,? ? ? ? ? ? ? ??
31
A? ? ? ? ? ? ?
B ? ? ? ? ? ? ? ?
G ? ? ? ? ? ? ?
A
B
P(A)0.4 P(B)1-0.40.6
P( \B)0.2 P(G\A)1
32
P(A G)
P(A G)
P(G)
P(A)P(G A)

P(A)P(G A)P(B)P(G B)
0.4
1

0.4


0.52
0.4 10.6 0.2



0.7692
???(???)76.92,???,????23.08
33
UE1 E2 E 3 E 4
P(Ei)????????
S
E1
E4
E3
E2
P(E1 S)
P(E1 S)
(???,??E1?????)
P(S)
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