... 0,496 12 ! 6!4! 412 (a) 0, 615 4 ; (b) 0,3692 (a) 12 ! (3!)4 412 , (b) p1 + (1 − p1 )p2 35 10 − ( 36 )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, ... = = C10 210 15 ´ ` ˜ Chuong Nhung kh´i niˆm co ban vˆ x´c suˆt ’’ a e e a a ’ ’ ’ 14 P (B) = C2 C8 11 2 = = C10 210 15 Do d´ ¯o P (C) = P (A) + P (B) = + = 15 15 ’ ˜ • V´ du 24 Mˆt lop c´ 10 0 ... ¯o b) P (A1 /B) = P (A2 ) = ; 97 P (B) = + = 10 16 0 P (A1 ).P (B/A1 ) 26 = 4978 = P (B) 97 16 0 ´ ’’ * Cˆy x´c suˆt cua cˆu a) cho boi a a a ’ a I X 10 T T II X 10 P (B/A2 ) = 10 ´ ´ ınh...