Question 752595
I'm running 9 trials with 5 possible results -- A,B,C,D, and E -- on each trial. 
How would I calculate the odds of Either A or B showing up at least 6 times? 
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Binomial Problem with n = 9 and p(A or B) = 2/5
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P(6<= x <=9) = 1 - P(0<= x <=5) = 1 - binomcdf(9,2/5,5) = 0.0994
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Cheers,
Stan H.
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