Suppose there are 71 types of stamps and that each new stamp collected is, independent of the previous selections, a type i stamp with probability $15,233 = 1. Suppose 5; i=1 stamps are to he collected. [f A; is the event that there is at least one type 1? stamp among those collected? then, for i ;E 3', nd: {a} PPM {11-} PM:- U Ail (6} Pmljl