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Ka wai 發問於 科學及數學數學 · 5 年前

Finite Math Question

Let X be a normal random variable with E(X) = 20 and σ(X)=10 . Find Pr[X < 22].

A.0.5793

B.0.5398

C.0.6179

D.0.7704

E.0.7881

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