Asked by Jen
A community of 100 homes constructed in 2009 contains 47 that used conventional construction. The reminder used Energy Star building standards. A real estate agent is going to show a client 5 homes. What is the probability that 3 were built using conventional methods?
Answers
Answered by
Reiny
prob of conventual home = 47/100
prob of ES = 53/100
prob(3 of 5 to be conventinal
= C(5,3)(47/100)^3 (53/100)^2
= .2916
prob of ES = 53/100
prob(3 of 5 to be conventinal
= C(5,3)(47/100)^3 (53/100)^2
= .2916
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