What is the average number of casualties for the convoy with a number of U-844?
CREATE TABLE table_name_5 (casualties INTEGER, number VARCHAR)
SELECT AVG(casualties) FROM table_name_5 WHERE number = "u-844"
### Context: CREATE TABLE table_name_5 (casualties INTEGER, number VARCHAR) ### Question: What is the average number of casualties for the convoy with a number of U-844? ### Answer: SELECT AVG(casualties) FROM table_name_5 WHERE number = "u-844"