i5F6139 QlEJZ'IElE: . What is the probability that at least 2 people in a group of 15 people will share a birthday? 365P15 365P15 365ls _ 365\" 365\" 23$! _ 365\" P15 Pl5 A C 1 B D 1 365 365 . Determine the number of subsets of 4 elements taken from a set of 11 elements if order does not matter. A 330 C 7920 B 1663200 D 14641 . How is "C, related to \"P,? P = " ' = v A "C, (WV)! C \"C, "Prxr. P n r B C: nr r! D "C, ="P, >