The weight of a model of computer laptops, X, is normally distributed with a mean of 2.8

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The weight of a model of computer laptops, X, is normally distributed with a mean of 2.8 pounds and a standard deviation of 0.1 pounds. What argument would you use to state that P(X ≤ 2.6) = P(X ≥ 3.0) without doing the calculation?

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