Suppose that a bin is filled with 10 red balls and 40 white balls. One ball is drawn at random from

the bin and it is a red ball. mlo85

Required:

a Assuming that the ball is put back into the bin and another ball is drawn at random, what is

the probability that the ball drawn will be a red ball? ;

b Assume that when the red ball is initially drawn it is not placed back into the bin. If a ball is

then drawn from the bin at random, what is the probability that it will be a red ball?