A bag contains 4 red and 3 black balls.A ball is picked up.If it is black it is discarded else if it is red it is put back with another red ball.What is the probability that the second ball drawn is red?
A bag contains 4 red and 3 black balls.A ball is picked up.If it is black it is discarded else if it is red it is put back with another red ball.What is the probability that the second ball drawn is red?