11. Incorrect. The answer is false, not true. Let X_i be a random variable which represents the weight of an ore load 'i'. Then, E[X_i] = 300 and σ_Xi = 50. According to the Central Limit Theorem, the sum of a random sample of 25 ore loads follows a normal distribution:

The requested probability is P[S > 8,200]. Standardizing S, we have that: