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categoryالرياضيات schoolبكالوريوس event_available2026-07-14

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The frequency of breakdown of a machine that issues lottery tickets is given in the following table. Repairs cost an average of $240. A service firm is willing to provide preventive maintenance under either of two options: #1 is $500 and covers all necessary repairs, and #2 is $350 and covers any repairs after the first one. Which option would have the lowest expected cost: pay for all repairs, service option #1, or service option #2? (Omit the "$" sign in your response.) Number of breakdowns/month Frequency of occurrence Repair approach $ 456 Service option #1 $ 500 Service option #2 $ 422 Repair approach Service option #1 Service option #2 0 10 1 .30 2 3 .30 .20 .10

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