Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used. The diagram represents the design of a triangular-shaped photo frame. Match the segments and angles to the descriptions.

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?