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_11318462_29 (founded VARCHAR, enrolment VARCHAR)

### Question ###
How many schools have an enrollment of 850?

### Accurate SQL ###

SELECT COUNT(founded) FROM table_11318462_29 WHERE enrolment = 850