The Probability of a Radar Station Detecting an Enemy Plane

question 9

Multiple Choice

The probability of a radar station detecting an enemy plane is 0.65 and the probability of not detecting an enemy plane is 0.35. If 20 stations are in use, what is the expected number of stations that will detect an enemy plane?

• A)20
• B)0
• C)18
• D)13
• E)none of these choices

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Individuals above the working age who are neither employed nor actively seeking employment.

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