I have no idea how to set this problem up. Assume the systolic blood pressure of a 30 year old males is normally distributed with an average of 122mm...

I have no idea how to set this problem up. 1. Assume the systolic blood pressure of a 30 year old males is normally distributed with an average of 122mm HG and a standard dev of 10mmHg. Calculate the probablity that the average blood pressure of a randomly selected 30 year old male will be greater then 125 mm Hg. (nearest ten thousandth)