For the race happened on 2015/11/29, how many drivers finished the game?
game and race are synonyms; drivers who finished the race should have record in time;
SELECT COUNT(T2.driverId) FROM races AS T1 INNER JOIN results AS T2 ON T2.raceId = T1.raceId WHERE T1.date = '2015-11-29' AND T2.time IS NOT NULL