SOLUTION: Hi there. 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? I t

Question 752595: Hi there.
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?
I tried .4^6 * 1^3 = ~ .4% which seems too low.
Total number of combinations is 5^9 -- 1953125. Total combinations with at least 6 A or B seems to be 2^6 * 5^3 -- 8000. Again leads to .4% Is it really that low or am I missing something?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
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?
-----------------
Binomial Problem with n = 9 and p(A or B) = 2/5
-----
P(6<= x <=9) = 1 - P(0<= x <=5) = 1 - binomcdf(9,2/5,5) = 0.0994
=================================================
Cheers,
Stan H.
====================
RELATED QUESTIONS
determine weather ot not the procedure described below results as in a binomial... (answered by solver91311)

Which statement is true for the binomial distribution? a. Probability of success... (answered by edjones)

A binomial probability distribution has n = 15 trials with the probability of success on... (answered by stanbon,Edwin McCravy)

Suppose that the duration of a particular type of criminal trial is known to be normally... (answered by math_tutor2020)

There are 9 candidates running for 3 seats on a committee. How many different election... (answered by Alan3354)

determine weather ot not the procedure described below results as in a binomial... (answered by jim_thompson5910)

The state lottery board is examining the machine that randomly picks the lottery numbers. (answered by solver91311)

What is the age distribution of patients who make office visits to a doctor or nurse? The (answered by richard1234)

Could you please help me to solve this problem? A binomial probability distribution... (answered by stanbon)