Two independent experiments are run in which the drying time in hours of two different types of paint are recorded and compared. For paint A, there are nà hours, and known A = 400 specimens, with A = 5.1 0.9 hours. For paint B, there are nB = 400 specimens, with B = 4 hours, and known OB= 1.1 hours. = Find the probability P(X₁ XB > 1), where X₁ and A A XB are the average drying times for the given samples.

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