SOLUTION: this is the question im tying to figure out - Historically, 5 percent of a mail-order firm�s repeat charge-account customers have an incorrect current address in the firm�s comput

Question 272413: this is the question im tying to figure out - Historically, 5 percent of a mail-order firm�s repeat charge-account customers have an incorrect
current address in the firm�s computer database. (a) What is the probability that none of the next 12
repeat customers who call will have an incorrect address? (b) One customer? (c) Two customers?
(d) Fewer than three? (e) Construct the probability distribution (using Excel or Appendix A), make
a graph of its PDF, and describe its shape.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Historically, 5 percent of a mail-order firm�s repeat charge-account customers have an incorrect current address in the firm�s computer database.
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Binomial Problem with n = 12 ; p = 0.05
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(a) What is the probability that none of the next 12
repeat customers who call will have an incorrect address?
P(x= 0) = 12C0(0.05)^0(0.95)^12 = 0.54..
--------------------------------
(b) One customer?
P(x= 1) = 12C1(0.05)^1(0.95)^11 = 0.34..
--------------------------------
(c) Two customers?
P(x= 2) = 0.099
------------------------
(d) Fewer than three?
P(0<= x <= 2) = Binomcdf(12,0.05,2) = 0.98..
(e) Construct the probability distribution (using Excel or Appendix A), make
a graph of its PDF, and describe its shape.
Can't show you that on this site.
===========================================
Cheers,
Stan H.
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