The owner of a beef market learns that the mean weight for beef is 12.3 pounds

The owner of a beef market learns that the mean weight for beef is 12.3 pounds, with a standard deviation of 3 pounds. Assuming that the weights of beef are normally distributed, what is the probability that a randomly selected beef will weigh less than 10 pounds?
0.221639864

. (Use the beef information from previous problem.) The middle 95% of beef will weigh between 6.420108046 pounds and 18.17989195 pounds. 
[Don’t forget the question is asking for pounds