Question #344510

1.(Binomial Distribution)Telephone manufacturers now offer 1000 different choices for a telephone (as combinations of color, type, options, portability, etc.). A company is opening a large regional office, and each of its 200 managers is allowed to order his or her own choice of a telephone. Assuming independence of choices and that each of the 1000 choices is equally likely, what is the probability that a particular choice will be made by none, one, two, or three of the managers?



1
Expert's answer
2022-05-30T23:37:36-0400

Given: n=200,p=1/1000=0.001,μ=np=0.2n=200, p=1/1000=0.001, \mu=np=0.2

So,

 P(0)=0.20e0.20!=0.8187P(0)=\frac {0.2^0e^{-0.2}}{0!}=0.8187

P(1)=0.21e0.21!=0.1637P(1)=\frac {0.2^1e^{-0.2}}{1!}=0.1637

P(2)=0.22e0.22!=0.0164P(2)=\frac {0.2^2e^{-0.2}}{2!}=0.0164

P(3)=0.23e0.23!=0.0011P(3)=\frac {0.2^3e^{-0.2}}{3!}=0.0011


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