A jar contains only one blue tile, one green tile, one red tile, and one yellow tile. If a tile is chosen at random and then replaced in the jar, and then a second tile is chosen at random, how many of the possible outcomes contain at least one red tile?

Because the tile is replaced, the two draws are independent and order matters, giving 4 × 4 = 16 possible outcomes. The outcomes with no red tile number 3 × 3 = 9, so 16 − 9 = 7 outcomes contain at least one red tile; the correct choice is 7.

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