NP: Nurse Practitioner Nurse practitioners are healthcare professionals that complete advanced, graduate level educational programs that enable them to practice independently or in collaboration with other health care professionals and other individuals to diagnose, treat and manage the patient's health problems.
sum. n. 1. Mathematics. a. An amount obtained as a result of adding numbers. b. An arithmetic problem: a child good at sums. 2. The whole amount, quantity, or number; an aggregate: the sum of the team's combined experience. 3.
More formally, the rule of sum is a fact about set theory. It states that sum of the sizes of a finite collection of pairwise disjoint sets is the size of the union of these sets. That is, if are pairwise disjoint sets, then we have: