a restaurant manager tracks the number of people in every party to sit at a specific table every day for a week and then complies the results into a probability distribution as shown in the table:
Number of people: 1, 2 ,3 ,4 ,5 ,6
Relative frequency, p(x): 0.05, 0.46, 0.18, 0.22, 0.06, 0.03
What is the expected value?