Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_50 ( matches INTEGER, team VARCHAR, strike_rate VARCHAR )

### Question ###
What were the total number of matches played when the Deccan Chargers had a strike rate of 15.5?

### Accurate SQL ###

SELECT MAX(matches) FROM table_name_50 WHERE team = "deccan chargers" AND strike_rate > 15.5