Among adults in the US, the albumin levels in cerebrospinal fluid has a mean 29.5 mg/100ml and a standard deviation of 9.25 mg/100ml. Assume the distribution of albumin levels in adults in the US follows a Normal Distribution. Using the empirical rule to answer the question, what is the probability that a randomly selected adult in the US has an albumin level between 11 mg/100ml and 48 mg/100ml?

answer choices

0.950

0.680

0.997

0.500