Drive for Show, Putt for Dough. An article by S. M. Berry titled Drive for Show and

Question:

Drive for Show, Putt for Dough. An article by S. M. Berry titled “Drive for Show and Putt for Dough” (Chance, Vol. 12(4), pp. 50–54) discussed driving distances of PGA players. The mean distance for tee shots on the 1999 men’s PGA tour is 272.2 yards with a standard deviation of 8.12 yards. Assuming that the 1999 tee-shot distances are normally distributed, find the percentage of such tee shots that went
a. Between 260 and 280 yards.
b. More than 300 yards.