Answer:
P(red then white) = 2/9
Step-by-step explanation:
This is a question about drawing with replacement; the first marble is returned to the bag before the second draw is made.
There are 6 marbles in the bag.
Probability of red on the first draw = 4/6 = 2/3.
Probability of white on the second draw = 2/6 = 1/3.
Probability of red, then white = 2/3 x 1/3 = 2/9.
(The drawings are made independently of each other--what happens on the second draw does not depend on the outcome from the first draw because the first marble was replaced.)
