https://cis.temple.edu/~latecki/Courses/CIS2033-Spring12/ElementaryProbabilityforApplications/ch3.pdf
The first step in analyzing craps is to compute the probability that the player makes his point. Suppose his point is 5 and let Ek be the event that the sum is k. There are 4 outcomes in E5 ((1, 4), (2, 3), (3, 2), (4, 1)), 6 in E7, and hence 26 not in E5 ∪ E7. Letting × stand for “the sum is not 5 or 7,” we see that 4 26 4 = P(5) P(× 5
https://www.temple.edu/sites/www/files/FINAL%20Campus%20Map%20November%202023.pdf
University Village (privately developed housing) C10, D10–11 Vantage Apartments (privately developed housing) D8–9, E8–10 The View at Montgomery Apartments (privately developed housing) D8–9 Wachman Hall E5 Weiss Hall E7–8, F7–8 Welcome Center/TECH Center D7–8 James S. White Hall