In a single row of yellow, green and red colored tiles, every red tile is preceded immediately by a yellow tile and every yellow tile is preceded immediately by a green tile. What color is the 24th tile in the row?

(1) The 18th tile in the row is not yellow.

(2) The 19th tile in the row is not green.

Because the information in the question as establishing a pattern as follows:

Green, Yellow, Red, Green, Yellow, Red, . . .

I come to an answer of (C)Both statements TOGETHER are sufficient, but NEITHER one ALONE is sufficient.

however, the actual answer is E. Can anyone help explain?