Question: If X has a normal distribution with mean = 50 and standard deviation = 9, determine (a) P(X 40), (b) P(X <

If X has a normal distribution with mean μ = 50 and standard deviation σ = 9, determine

(a) P(X ≤ 40),

(b) P(X < 55),

(c) P(X > 60),

(d) P(40 ≤ X ≤ 60).

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