1. The problem statement, all variables and given/known data I need to find the variance of Y. The number of errors on a page follows a Poisson distribution with lambda = 0.40 average . Y = the number of pages without error among the first 112 pages . 2. Relevant equations 3. The attempt at a solution In Poisson, I know that Variance = lambda= 0.40 In Binomial, Variance = n*p*q 1-p = q Do I simply do 112 x 0.4 x 0.6 to find the variance of Y? How am I supposed to do it?