Теория вероятностей. Барышева В.К - 27 стр.

UptoLike

P (AB) = P (A) P (B|A) = P (B) P (A|B) .
A
1
, A
2
, A
3
, . . . , A
n
.
P (A
n
| A
1
), P (A
n
| A
1
A
2
), P (A
n
| A
1
A
2
A
3
), . . . ,
. . . , P (A
n
| A
1
A
2
···A
n1
),
P (A
1
A
2
A
3
) = P (A
1
)P (A
2
| A
1
)P (A
3
| A
1
A
2
)
P (A
1
A
2
A
3
A
4
) = P (A
1
)P (A
2
| A
1
)P (A
3
| A
1
A
2
)P (A
4
| A
1
A
2
A
3
)