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

84⎛2⎞⎜ ⎟2P(A) =⎝ ⎠=⎛4⎞⎜ ⎟⎝2⎠16 : P(A) n > 20 np ≤ 5 . 4 (19λ = np = 0/001×2000 = 2 < 5λxe−λP(x) =X!⇒ P( 3)=32e−23!= 0/18. : . 1 (20⎛3⎞⎛5⎞⎜ ⎟⎜⎟CkCN−K1 1 3×5 15 15P(x) = x n − x =⎝ ⎠⎝⎠= = =CN ⎛8⎞8×7×6!56 28n ⎜ ⎟⎝2⎠2!6!2. . 1 ( 21⎛4⎞⎛66⎞⎜ ⎟⎜⎟⎝0⎠⎝10P ( ) =1− P ( ) = 1−⎠⎛70⎞⎜ ⎟⎝10⎠. . . 3 (22210 µ = 210⇒ µ = = 7 ⇒ µ x = δx= 730. 4 (23 . 4 (24Ck N −K= x CP(x) n − xCNn⎛10⎞⎛3⎞⎜ ⎟⎜⎟1 1=⎝ ⎠⎝⎠⎛13⎞⎜ ⎟⎝2⎠10×3= =13×12260156=3078. . 1 (25