A national Italian restaurant has created a healthy option to one of its most popular dishes. The original dish's portion size has a mean / of 1,500 calories with a standard deviation of 50 calories, and the healthy alternative's portion size has a mean / of 950 calories with standard deviation of 25 calories. The resulting normal distribution of the calorie savings by choosing the healthy option over the original dish has a mean u of 550 calories saved and standard deviation o of 55.9 calories. John and Mary go to the restaurant, and both order the healthy option. What is the probability that their average calorie savings is equal to or greater than 600 calories when John and Mary both opt for the healthier alternative