7-6. X is N(50, 10). Find: (a) P(X 60) (b) P(X 55) (c) P(40

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7-6. X is N(50, 10). Find:

(a) P(X ≤ 60)

(b) P(X ≥ 55)

(c) P(40 ≤ X ≤ 49)

(d) γ0.70

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