Perez Electronics Repair Business

Perez Electronics is a family-owned electronics repair business. After finding more data, the new probability distribution is as follows:

Number of Days	Probability
1	0.16
2	0.25
3	0.31
4	???
5	0.12

Calculate the expected value for the number of days his customers wait for a repair.

(Give your answer in decimals. Round to the nearest 2 decimal places, if needed.)