Let $x$ Be a Random Variable That Is Normally Distributed with the with the Given

Multiple Choice

Let $x$ be a random variable that is normally distributed with the given mean $\mu = 50$ and standard deviation $\sigma = 10$ . Find the probability $P ( 30 < x < 55 )$ using a symbolic integration utility.

A) 0.7970
B) 0.5889
C) 0.6687
D) 0.5359
E) 0.6302