m sample of size n₁ = 13 is selected from a normal population with a mean of 76 and a standard deviation of 7. A second sample of size n₂ = 9 is taken from another normal population with mean 68 and standard deviation 15. Let X₁ and X₂ be the ple means. Find: probability that X₁ X₂ exceeds 3. probability that 4.1 ≤ X₁ X₂ 5.4. your answers to two decimal places (e.g. 98.76).

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