Table: mirzapur_loksabha
Columns: constituency_number
name
reserved_for_sc_st_none
district
number_of_electorates_2009

Question: Which Number of electorates (2009) has a Reserved for (SC / ST /None) of total:?
SQL: SELECT "number_of_electorates_2009" FROM mirzapur_loksabha WHERE "reserved_for_sc_st_none" = 'total:'