you have 3 red sweaters 2 black sweaters. and 4 gray sweaters. you randomly pick one sweater, put it back, then randomly pick another. fin the probability that the first sweater chosen is red and the second is gray.
the two selections are independent events
... all the sweaters are available for selection
9 total sweaters
p(red) = 3 / 9
p(gray) = 4 / 9
the probability of red then gray is the product of the individual probabilities