Marbles
There are two boxes of marbles. Box A contains ______ red marbles and ______ green marbles. Box B contains ______ red marbles and ______purple marbles. A marble is drawn from each box at random. Fill in each blank with a single nonzero digit. The same digit can't be used more than once.
a) Fill in the blanks so that the probability of drawing a red marble from Box A is higher than the probability of drawing a red marble from Box B.
b) Fill in the blanks so that the probability of drawing a red marble from each box is the same.