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_11713303_2 (replaced_by VARCHAR, date_of_appointment VARCHAR, manner_of_departure VARCHAR)

### Question ###
How many have been replaced where the appointment date is 10 December 2007 and the manner of departure is quit?

### Accurate SQL ###

SELECT COUNT(replaced_by) FROM table_11713303_2 WHERE date_of_appointment = "10 December 2007" AND manner_of_departure = "Quit"