4.2.2. A medical study recently documented that 905 mis- takes were made among the 289,411 prescriptions written during one year at a large metropolitan teaching hospi- tal. Suppose a patient is...

Extracted text: 4.2.2. A medical study recently documented that 905 mis- takes were made among the 289,411 prescriptions written during one year at a large metropolitan teaching hospi- tal. Suppose a patient is admitted with a condition serious enough to warrant 10 different prescriptions. Approxi- mate the probability that at least one will contain an error.