Use the Following Information for Following Questions

Multiple Choice

Use the following information for following questions . The mean time it takes for workers at a factory to insert a
delicate bolt into an engine is 15 minutes. The standard deviation of time to insert the bolt is 4.0 minutes and the
distribution of time is approximately normally distributed.
-For a randomly selected worker, what's the approximate probability the bolt will be inserted in 19 minutes or less? Round to the nearest whole percent.

A) 50%
B) 84%
C) 18%
D) 16%