Question

Consider two boxes, one containing 1 black and 1 white marble, the other 2 black and 1 white marble. A box is selected at random, and a marble is drawn from it at random. What is the probability that the marble is black? What is the probability that the ď¬rst box was the one selected given that the marble is white?

Answer 1

60% probability that the marble is black
50%probability is that the first box was the one selected given that the marble is white