1( = @ 1( > 2( > 3( 4( > 2( 45 % @ @ > > > @ > > = > 1( 180 2( 162 3 ...

13885 P (W2 ) = P(W 1)⋅ P(W2/ W 1)+ P(B1)⋅ P(W2/ B 1 )4 3 3 4 12 + 12 24P(W2 ) = × + × = = =7 6 7 6 42 42P( 4 647. 4 (1 :W : B. . 4 (2⎛25⎞⎛15⎞⎜ ⎟⎜⎟⎝4⎠⎝6) =⎠⎛40⎞⎜ ⎟⎝10⎠. . 2 (3P(A) =SASsπr2=πR2⎛= ⎜⎝rR2⎞⎟⎠. 2 (4P( ) = P( ) + P( )P = P1 ( 1−P2) + P2( 1−P1) = 0/95×0/1+0/5×0/9 = 0/14. . 2 (51 4 1 7P(W) = P(K1 ) ⋅ P(W / K1)+ P(K2)⋅P(W / K2)= × + × =2 10 2 101 4×P(K1)⋅P(W / K1)2 10 4P(K1 / W) == =P(W) 11 1120E(x / y+∞413 11= 1)= ∫ xf (x / y = 1)dx=2∫(3x+ x3) dx =−∞70 2 141120 : K. 1 (6: y= 1