Which of the following explains why a salesperson might wish to revisit the needs assessment?
to overcome objections
to negotiate the terms of the sale
to outline possible solutions to problems
to understand what the client is willing to concede

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?