As mitch walks through the conference hall before his conference, he greets approximately 50 new people. based on his short-term association with these people, mitch will most likely remember the names of individuals.

7 ± 2                                                

Explanation:

Based on Mitch's short-term association with these people, Mitch will most likely remember the names of 7 ± 2 individuals.

George A. Miller, who was a psychologist has discovered the magical number seven in 1956. According to him, 7 ± 2 is the average capacity of an individual brain's working memory i.e short-term memory. In other words, most individuals can store 5 to 9 items in their working memory or short-term memory.