Question: Because of bad weather, the number of days next week that the captain of a charter fishing boat can leave port is uncertain. Let x = number of days that the boat is able to leave port per week. The following probability distribution for the variable, x, was determined based on historical data when the weather was poor:
x P(x)
0 0.05
1 0.10
2 0.10
3 0.20
4 0.20
5 0.15
6 0.15
7 0.05
Based on the probability distribution, what is the expected number of days per week the captain can leave port?