Doctor 1. B's point of view is wrong. The probability of surgical death is 20%. Although all the previous patients are dead, patient A may not succeed. After all, he may die by 20%.

2. The probability that the player rolls the dice to 6 is 1/6, and the probability of all 6' s is (1/6) 4 =11296. Due to the remote possibility, the club can make a profit.