CREATE TABLE table_name_66 (year NUMBER, points VARCHAR2, wins VARCHAR2, class VARCHAR2)

What is the mean year number where there are more than 0 wins, the class is 250cc, and the points are 95?
SELECT AVG(year) FROM table_name_66 WHERE wins > 0 AND class = "250cc" AND points = 95
SELECT AVG("year") FROM "table_name_66" WHERE "250cc" = "class" AND "points" = 95 AND "wins" > 0