Based on Historical Data,the Diameter of a Ball Bearing Is

Multiple Choice

Based on historical data,the diameter of a ball bearing is normally distributed with a mean of 0.527 cm and a standard deviation of 0.008 cm.Suppose that a sample of 18 ball bearings are randomly selected from a very large lot.Determine the probability that the average diameter of a sampled ball bearing is greater than 0.530 cm.

A) 0.2324
B) 0.4938
C) 0.5062
D) 0.0559