Alexis works at a health care facility. She has measured the hemoglobin levels of 400 people. The data follows a normal distribution with a mean of 16 g/dL and a standard deviation of 2. What is the chance that if Alexis pulls a file randomly, that that patient would have a hemoglobin level between 12 and 20 g/dL? Select one: a. 95% Ob. 99.7% O c. 50% Od. 68% O e. 20%