In a multi-user operating system, on average 20 requests are made to use a particular resource per hour. The probability that no request is made in 45 minutes is
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Correct answer: A. e⁻¹⁵
Explanation
Poisson arrivals: mean in 45 min = 20 × 0.75 = 15, so P(0 requests) = e⁻¹⁵.More Discrete Structures and Optimization questions
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