1( = @ 1( > 2( > 3( 4( > 2( 45 % @ @ > > > @ > > = > 1( 180 2( 162 3 ...
1( = @ 1( > 2( > 3( 4( > 2( 45 % @ @ > > > @ > > = > 1( 180 2( 162 3 ...
1( = @ 1( > 2( > 3( 4( > 2( 45 % @ @ > > > @ > > = > 1( 180 2( 162 3 ...
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83E(x) = np = 43 / 2Var(x) = npq = 3 / 2 ⇒ 4q= 3 / 2 ⇒ q = ⇒ p =4n ×210= 4 ⇒ n = 20⎛n⎞P(X = 0)= ⎜ ⎟p0qn⎝0⎠E(X) = np = aV(x) = npq = b ⇒ aq = b ⇒ q =P(X = 0)=nq a= ( )−nbpba n 210. 2 (13 . 2 (14. 1λ = np = n × = 1n P(T = 0)= P(A)= 1−P(A ′)⎛3⎞= 1−⎜ ⎟p3q0= 1−p3⎝3⎠e−110P(X = 0)= = e−10!⎛3⎞⎛2⎞⎜ ⎟⎜⎟1 1P(A) =⎝ ⎠⎝⎠=⎛5⎞⎜ ⎟⎝2⎠610=35. 2 (15. xi :P(A). xi : P(A ′). 2 (16 : P(A). . 1 (17 . 4 (18.
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