SOLUTION: Find the requested probability. P(A) if P(A) = 0.4 P(A) = *** The "A" has a line over it but I can't figure out how to put it over it.

Algebra ->  Probability-and-statistics -> SOLUTION: Find the requested probability. P(A) if P(A) = 0.4 P(A) = *** The "A" has a line over it but I can't figure out how to put it over it.      Log On


   

Question 882198: Find the requested probability.
P(A) if P(A) = 0.4
P(A) =
*** The "A" has a line over it but I can't figure out how to put it over it.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
is the complementary event of event A. It is the complete opposite of event A. So that means



since one or the other event must happen (but not both at the same time). Isolate to get



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Now plug in the given probability P(A) = 0.4 and evaluate