SOLUTION: Lucy Lui purchased a mailing list of 2000 names and addresses for her mail order business, but after scanning the list she doubts the authenticity of the list. She randomly selects
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-> SOLUTION: Lucy Lui purchased a mailing list of 2000 names and addresses for her mail order business, but after scanning the list she doubts the authenticity of the list. She randomly selects
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Question 1159161: Lucy Lui purchased a mailing list of 2000 names and addresses for her mail order business, but after scanning the list she doubts the authenticity of the list. She randomly selects five names from the list for validation. If 40% of the names on the list are not authentic, and x is the number of non-authentic names in her sample, P(x<2) is ______________. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! Want probability x=0 and x=1
for x=0 this is 0.6^5 for 60% of names being authentic
that is 0.0776
for x=1, it is 5*0.6^4*0.4=0.2592
The sum of those two is 0.3368
