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What is the probability that really authorized

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A biometric security devise using fingerprints erroneously refuses to admit 1 in 1000 authorized persons from a facility containing classified information. The device will erroneously admit 1 in 10,00,000 unauthorized persons. Assume that 95% of those who seek access are authorized. If the alarm goes off and a person is refused admission, what is the probability that really authorized?

Reference no: EM13316235

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