Question

Given that the tourist visits Red fort, how many of the 5 monuments that he visits are known?

• A. 4
• B. 2
• C. 3
• D. 5

Answer 1

The correct option is D 5

The question tells us that if the tourist visits Red Fort, he will visit Qutub Minar and Jantar Mantar as well, so we know 3 of the monuments from that statement. The question also tells us that, if the tourist does not visit Humayun's tomb, he will not visit Red Fort. This can be cast in logical notation as Humayun's Tomb $\leftarrow$ Red Fort, the converse of which is Red Fort $\to$ Humayun's tomb
Since he visits Red Fort, he always visits Humayun's tomb. We know that he always visit India Gate. We have thus determined that the 5 monuments he will visit are Red Fort, Qutub Minar, Jantar Mantar, Humayun's tomb and India Gate.