CREATE TABLE table_15820 ("District" CLOB, "Counties Represented" CLOB, "Party" CLOB, "First Elected" FLOAT, "Committee" CLOB)

What is the average first elected year that has a district of 11 and a committee of environmental matters?
SELECT AVG("First Elected") FROM table_15820 WHERE "District" = '11' AND "Committee" = 'environmental matters'
SELECT AVG("First Elected") FROM "table_15820" WHERE "Committee" = 'environmental matters' AND "District" = '11'