A Gasoline Tank for a Certain Car Is Designed to Hold

Multiple Choice

A gasoline tank for a certain car is designed to hold 19 gallons of gas. Suppose that the random variable x = actual capacity of a randomly selected tank has a distribution that is well approximated by a normal curve with mean 19.0 gallons and standard deviation 0.2 gallon. ​
What is the probability that a randomly selected tank will hold at least 18.9 gallons?
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A) 0.19
B) 0.69
C) 1
D) 0.31
E) 0.81