Do the ordered pairs below represent a relation, a function, both a relation and a function, or neither a relation nor a function? (-1,-7) , (3,-11) , (-1,-13) , (8,-16)

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?