The length of country and western songs is normally distribu

The length of country and western songs is normally distributed and has a mean of 200 seconds and a standard deviation of 40 seconds. Find the probability that a random selection of 40 songs will have mean length of 191.5 seconds or less. Assume the distribution of the lengths of the songs is normal.

Select one:

a. 0.86

b. 0

c. 0.09

d. 0.91

e. Cannot be determined

Solution