7bii) may2009 st : "calculate the probrability, when sorting a batch of 35 letters, mrs fewer sorts atleast one letter incorrectly. This is a binomial distribution question, but I have no idea how to go about it, since n=35 table isn't in the formula booklet, and I've tried using the formula, (using x=0 and x=1) but the answer made no sense. I couldn't understand the markscheme either. Thanks for any replies!! (P=0.06) for this. Each sorting of a letter may be assumed to be in dependant.