The Distribution of Vitamin C Amount in the Vitamin Drops

The distribution of vitamin C amount in the vitamin drops produced by a given factory is approximately Normal, with a mean of 60.0 mg and a standard deviation of 0.5 mg. If you take a random sample of 25 vitamin drops, what is, approximately, the probability that the average vitamin content x̄ is between 60.25 and 60.75 mg?

A) 0.01
B) 0.16
C) 0.24
D) 0.38