Playing 2 1 minute in the casino, the dealer has an advantage because most players don't play very well. So the average player's probability of winning a hand is about 40%. An ordinary player decides to play 10 hand. Therefore, the answer to A is 0.4 to the power of 10. B. 1-0.4 to the tenth power. After that, I can't type the answer symbol. If you really want to know, please contact me, QQ 330976043.