CREATE TABLE table_24635 ("Team" TEXT, "Car ( s ) " TEXT, "#" FLOAT, "Driver ( s ) " TEXT, "Primary Sponsor ( s ) " TEXT, "Listed Owner ( s ) " TEXT, "Crew Chief" TEXT)

How many cars does Gregg Mixon own?
SELECT COUNT("Car(s)") FROM table_24635 WHERE "Listed Owner(s)" = 'Gregg Mixon'
SELECT COUNT("Car(s)") FROM "table_24635" WHERE "Listed Owner(s)" = 'Gregg Mixon'