CREATE TABLE table_12299 ("Constituency number" FLOAT, "Name" TEXT, "Reserved for  (  SC / ST /None ) " TEXT, "District" TEXT, "Number of electorates  ( 2009 ) " FLOAT)

Which Number of electorates (2009) has a District of jhajjar, and a Reserved for (SC/ST/None) of sc, and a Constituency number smaller than 66?
SELECT COUNT("Number of electorates (2009)") FROM table_12299 WHERE "District" = 'jhajjar' AND "Reserved for ( SC / ST /None)" = 'sc' AND "Constituency number" < '66'
SELECT COUNT("Number of electorates (2009)") FROM "table_12299" WHERE "Constituency number" < '66' AND "District" = 'jhajjar' AND "Reserved for ( SC / ST /None)" = 'sc'