Question

If on Wednesday Graphics, Marketing, and Research are scheduled for room 1, room 2, and room 3, respectively, then any of the following can be true EXCEPT:

• A. Graphics is scheduled for room 2 on Thursday and Research is scheduled for room 1 on Friday.
• B. Graphics is scheduled for room 3 on Thursday and Marketing is scheduled for room 3 on Friday.
• C. Marketing is scheduled for room 1 on Thursday and Graphics is scheduled for room 2 on Friday.
• D. Marketing is scheduled for room 3 on Thursday and Research is scheduled for room 2 on Friday.
• E. Research is scheduled for room 2 on Thursday and Marketing is scheduled for room 3 on Friday. \textbf

Hint:

Check each option against possible schedules; find the impossible conjunction.

Answer 1

The Correct Option is A

Step 1: Wed: 1-G, 2-M, 3-R.
Step 2: Possible Th: (1-M, 2-R, 3-G) or (1-R, 2-G, 3-M); F remaining.
Step 3: (A) requires G-2 Th (only in second) but then F-1 M (not R); R-1 F (only in first) but then 2-Th R (not G). Contradiction.
Step 4: Others possible in at least one case.