text: Yes, that would be the probability that he wins 7 or fewer games\n\n15!/(0!15!)(0.3^0)(0.7^15) + 15!/(1!14!)(0.3^1)(0.7^14) + ... + 15!/(7!8!)(0.3^7)(0.7^8)\n\nYou would have to compute 8 probabilities and add them together.\n\nI get it to be about 0.95.