Posted by **Lyndyc** on Thursday, December 5, 2013 at 8:16pm.

A normal distribution has a mean of ƒÝ = 100 with ƒã = 20. If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 90 and X = 110?

a. 0.6915

b. 0.3085

c. 0.1915

d. 0.3830

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