Abag contains only red and blue marbles yasmin takes one more level at random from the back the probability that she takes a red marbles one in the five yasmin returns the marbles in the bag and adds five more red marbles to the back the probability that she takes aches one red marble at random is now one and three how many red marbles were originally in the bag for you red 5 red 2 red 10 red 2000 points. who ever can do this is vary !