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Statistics 10 Online
OpenStudy (anonymous):

Suppose the cost of performing an experiment is $1000. If the experiment fails, an additional $300 occurs for certain repairs before the next trial. Suppose the probability of a successful trial is 0.2, and that trials are independent. If trials continue until a success, a) what is the probability that it will take at least 3 attempts? b) what is the expected cost?

OpenStudy (anonymous):

at least three means not zero not one not two compute these, subtract the result from 1

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