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En flyplass i Nord-Norge betjenes av tre flyselskaper. Av alle flygninger til denne flyplassen har flyselskap A 60 %, flyselskap B har 30 %, og flyselskap C har 10 %. Av alle avgangene letter 80%, 60 % og 40 % etter ruteplanen for henholdsvis flyselskap A, B og C. Vi definerer følgendehendelser:

A: Flygningen tilhører flyselskap A
B: Flygningen tilhører flyselskap B

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C: Flygningen tilhører flyselskap C

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D: Flygningen letter etter ruteplanen

Merk: alle svarene er tall mellom 0 og 1, der kommatall skrives med punktum.

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Bestem sannsynligheten

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Bestem sannsynligheten

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Bestem sannsynligheten

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Hva er sannsynligheten for at et fly letter etter ruteplanen?

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Dersom et fly letter etter ruteplanen, hva er sannsynligheten for at det var flyselskap A?

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