
#19
Feb1114, 05:27 PM

Math
Emeritus
Sci Advisor
Thanks
PF Gold
P: 38,896

Your use of the "and rule" is incorrect. What is true is that if P and Q are independent events, then the probability that P and Q happen in that order is P(P)P(Q). The probability that Q and P happen in that order is P(Q)P(P). The probability that P and Q happen in either order is P(P)P(Q)+ P(Q)P(P)= 2P(P)P(Q)



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