The graph at left in the R 1-plane shows the current, 1, in amperes for a circuit with a resistor having Rohms of resistance. What is the
significance of the valueI = 4 shown by the dotted line?

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?