d. Find the conditional density function for the number of salespersons who are absent, given that there are no gardeners absent. What is the probability that there are no salespersons absent, given that there are no gardeners absent? Is the conditional probability higher or lower given that there is at least one gardener absent?

12. The joint density of the bivariate random variable

(X, Y) is given by f(x, y) = xyllo,lj(x)Ilo,21(Y)'