At a certain intersection, of all cars traveling north, the
relative frequency of cars continuing in the same direction is p.
The relative frequency of those turning east is q; all others turn
west.
Assume that drivers behave independently of one another. A small
group of n cars enters the intersection. For this group
(a) What is the marginal distribution of Y, the number of cars
turning west? Find the conditional distribution of X, the number of
cars turning east,...