The Procurement Bureau Runs Tests On 30 Brand X Teletype Machines It Finds That An A 2769321
The Procurement Bureau runs tests on 30 brand X teletype machines. It finds that an average of three machines fail in any 1-day period. Against the bureau’s advice, the Public Affairs Department purchased 140 of these machines for all state offices. On the first day, 26 machines fail. What is the probability that this would happen if the true failure rate were 10%?
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