A store sells ground meat in small, medium, and large sizes. The weights of the small size packages have a mean weight of 1 pound and a standard deviation of 0.1 pound. If the distribution of weights for the small size packages of ground meat is approximately normally distributed, which of the following is the best estimate of the probability that a randomly selected small size package has a weight less than 0.9 pound? a
0.025
b
0.16
c
0.32
d
0.68