A bag contains 30 marbles, 3 of which are blue, 20 are red, 5 are green, and 2 are purple. Emerson takes a marble out of the bag, records the color, and returns it to the bag. How many purple marbles should he expect after 300 trials? (5 points)
20
30
50
200
30
To solve this problem, we need to calculate the probability of drawing a purple marble in one trial. There are 2 purple marbles out of a total of 30 marbles, so the probability is 2/30 = 1/15.
In 300 trials, we would expect to see 300 * (1/15) = 20 purple marbles. So Emerson should expect to see 20 purple marbles after 300 trials.