Hi! I appreciate your help with the result and approach for these questions. Thanks!

Problem 2 1.5 points possible [graded results hidden) A group of n professionals sit at a table at a conference. Before the presentation begins, they all put their cellular phones into a basket in the middle of the table. One of them, Keira, has a white phone. At the end of the presentation, she reaches for a white phone in the basket. However, she is not the only one who has a white phone. The probabilty of the others at her table having a white phone is 3). Given that she has picked a white phone, what is the probability that the phone in her hand is actually hers? STANDARD NOTATlON