IT IS TEMPTING TO VIEW THE INFORMATION IN THE QUESTION AS ESTABLIS...
16. It is tempting to view the information in the question as
establishing a pattern as follows:
Green, Yellow, Red, Green, Yellow, Red, . . .
However, consider that the following non-pattern is also possible:
Green, Yellow, Red, Green, Green, Green, Green . . .
(1) INSUFFICIENT: This tells us that the 18th tile is Green or Red
but this tells us nothing about the 24th tile. Statement (1) alone is
NOT sufficient.
(2) INSUFFICIENT: This tells us that the 19th tile is Yellow or Red
but this tells us nothing about the 24th tile. Statement (2) alone is
(1) AND (2) INSUFFICIENT: Together, the statements yield the
following possibilities for the 18th and 19th tiles:
GY, GR, RY, or RR
However, only GY adheres to the rules given in the question. Thus,
we know that tile 18 is green and tile 19 is yellow. However, this
does not help us to determine the color of the next tile, much less
tile 24 (the one asked in the question). For example, the next tile
(tile 20) could be green or red. Thus, the statements taken together
are still not sufficient.
The correct answer is E.