3 3 points A company is conducting staff development training remotely for its 65 management staff across the nation During specialty sections participants were assigned to three breakout rooms according to their specialty 17 in room 1 21 in room 2 and the rest to room 3 They are required to take a test based on their specialty a 1 5 points If a total of 8 participants failed the specialty test determine the probability that a quarter of them was in room 3 b 1 5 points Three participants were kicked out of the training by internet disruption find the probability that at least one of them is not in room 1