Answer:
Answer choice B
Step-by-step explanation:
P(A and B) means that you need to multiply the two probabilities together, since both A and B need to happen. The probability of drawing a black tile on the first draw is 4/15, since there are 15 total tiles and 4 of those are black. On the second draw, the bag is already missing a tile, and there are therefore 14 tiles remaining. For the second one, the probability is 5/14, since there are 14 total tiles and 5 of them are white. Multiplying these two together, you get 4/15*5/14=20/210=2/21, or answer choice B. Hope this helps!
