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_80 (number_of_electorates__2003_ INTEGER, reserved_for___sc___st__none_ VARCHAR, constituency_number VARCHAR)

### Question ###
What is the average number of electorates (2003) reserved for sc with a constituency number of 50?

### Accurate SQL ###

SELECT AVG(number_of_electorates__2003_) FROM table_name_80 WHERE reserved_for___sc___st__none_ = "sc" AND constituency_number = "50"