n=4, p= 0.05 x p(x) = C(5,x)(.05)x(.95)5-x ------------------------------------------------------- 0 p(0) = C(5,0)(.05)0(.95)5-0 = .774 1 p(1) = C(5,1)(.05)1(.95)5-1 = .204 2 p(2) = C(5,2)(.05)2(.95)5-2 = .021 3 p(3) = C(5,3)(.05)3(.95)5-3 = .001 4 p(4) = C(5,4)(.05)4(.95)5-4 = .000 5 p(5) = C(5,5)(.05)5(.95)5-5 = .000 Shorten the table to just two columns: x p(x) --------- 0 .774 1 .204 2 .021 3 .001 4 .000 5 .000 --------- sum=1.000 Edwin