1. One of the most common blood tests used to help diagnosis a wide variety of diseases is a complete blood count (CBC). After taking blood from a patient, it is then analyzed by an automated hematology analyzer which counts all the different cells found in the blood and their sizes. A CBC test can be especially useful in diagnosing the presence of parasites. In the blood there are Parasitic fighting white blood cells called eosinophils. The United States population exhibits an approximately normally distributed Eosinophil CBC count with a mean of 380 cells per microliter with a standard deviation of 45 cells per microliter. When there is an active parasitic infection, it is found that the eosinophil count is specifically high (over 520 cells per microliter). What is the probability that a randomly selected person has a high eosinophilic count?

1. 3.11
2. 0.9991
3. 0.0009
4. -3.11
5. 0.965