SOLUTION: a recent issue of bride magazine suggested that couples planning their wedding should expect two-thirds of those who are sent am invitation to respond that they will attend. rich a

Question 201218This question is from textbook statistics techniques in business and economics
: a recent issue of bride magazine suggested that couples planning their wedding should expect two-thirds of those who are sent am invitation to respond that they will attend. rich and stacy are planning to be married later this year. They plan to send 197 invitations
Question: what is the probability exactly 140 will accept the invitation? This question is from textbook statistics techniques in business and economics

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
a recent issue of bride magazine suggested that couples planning their wedding should expect two-thirds of those who are sent am invitation to respond that they will attend. rich and stacy are planning to be married later this year. They plan to send 197 invitations
Question: what is the probability exactly 140 will accept the invitation?
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It's a binomial problem with n = 197 ; p = 2/3 ;x = 140
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P(x=140) = 197C140 (2/3)^140*(1/3)^53 = 0.2599...
Cheers,
Stan H.
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