Question 273125
The number of golf balls ordered by customers of a pro shop has the following probability distribution:
x 3 / 6 / 9 / 12 / 15 /
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P(X) 0.27 / 0.17 /0.33 / 0.12 / 0.11 / 
I know the mean is 7.89 and the standard deviation is 3.88
u=sum(x times P(x)) divided by P(P(x)) 
I'm not sure what is the process of this question
Find the probability of six or more golf balls being ordered? 
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Adding the P(x) values you see they sum to 1.
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So, P(x >= 6) 
= 1 - P(x=3)
= 1 - 0.27
= 0.73
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Cheers,
Stan H.
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