Question 900278
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Hi
Classes		P1	P2	P3    T
T1		30	25	60    115
T2		55	25	35    115
T3		45	35	20    100
T4		60	40	40    140 
Total                    190        125         155        470
A 
 1) class T1  115/470
 2) classT2   115/470
 3) classT3   100/470
 4) classT4   140/470
 B class P1 and Class p3
 C
 (1) class P1 with class P3   90/470
 2) class T3 with class P2  20/470
 3) class P2 with class T4  40/470

p(hit) = 3/5
2 tries
P(2 hits) = (3/5)(3/5)
p(1 hit) = 2(3/5)(2/5)  (first 0r Second)
p(f not second) = (3/5)(2/5)
P(2misses) = (2/5)(2/5)