Hi The number of white corpuscles on a slide has a Poisson distribution with mean 3.4. a. the most likely number of white corpuscles on a slide = 3 (need whole number) b. P(x=3) = poissonpdf(3.4, 3) = .219 (3 decimal points) c. P(obtaining at least one white corpuscle in total on the two slides) P(x=0) = poissonpdf(3.4, 0) = .033 Using complement(at least 1) = 1 - .033 = .967 (on a slide) P(of obtaining at least one white corpuscle in total on the two slides) 1- (.033)(.033) Wishing You the Best in your Studies.