Does listening to soothing music employees concentrate better? a psychologist studied the number of puzzles employees of a large business were able to solve in a five-minute period while listening to soothing music. let x be the number of puzzles completed successfully by a subject. the psychologist found that x had the following probability distribution.

#puzzles completed probability
0 0.06
1 0.16
2 0.19
3 0.32
4 0.24
5 0.03
what is the expected number of puzzles completed by an employee ?