CREATE TABLE table_name_21 (number_of_electorates__2009_ VARCHAR(255), reserved_for___sc___st__none_ VARCHAR(255))
Which Number of electorates (2009) has a Reserved for (SC / ST /None) of total:?
    
SQL: SELECT number_of_electorates__2009_ FROM table_name_21 WHERE reserved_for___sc___st__none_ = "total:"