... (T2) =23P (D 1 ) = 1 − P (T 1 ) =56P (D2) = 1 − P (T2) = 1 3Suy raP (A) = P (T 1 D2) + P (T2D 1 ) = P (T 1 ).P (D2) + P (T2).P (T 1 )= 1 6. 1 3+23.56= 11 8• V´ı du.28 ... (A 1 ).P (B/A 1 ) + P (A2).P (B/A2)P (A 1 ) = 1 4; P (B/A 1 ) =58; P (A2) =34; P (B/A2) =6 10 Do ¯d´oP (B) = 1 4.58+34.6 10 =97 16 0b) P (A 1 /B) =P (A 1 ).P (B/A 1 )P ... p 1 + (1 − p 1 )p2. 10 . 1 − (3536)20. 12 . (a) p = (0, 97)20= 0, 5438,(b) p = 20(0, 03)(0, 97) 19 + 19 0(0, 03)2.(0, 97) 18 = 0, 4352,(c) 1 − 0, 54338 − 0, 4352 = 0, 0 21 13. 0,99 14 ....