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प्रश्न
Select the correct alternative from the given choices.
Each of the three persons - Ramu, Raman, and Rajan-belonged to exactly one of the different cities amongst Delhi, Mumbai and Chennai. Each person always gives two replies to any question asked. Out of these three, exactly one person always speaks the truth, another always lies and the other always alternates between truth and lie, in any order. When each was asked "Which city do you belong to?", the following were their replies:
Ramu: I am from Delhi. Raman is from Mumbai.
Raman: I am from Delhi. Rajan is from Chennai.
Rajan: Ramu is from Mumbai. Raman is from Delhi.
Based on the above, answer the following questions.
Which city did Raman belong to?
विकल्प
Delhi
Mumbai
Chennai
Chennai or Delhi
उत्तर
(i) Assuming Ramu always speaks the truth:
| I | II | City | |
| Ramu | T | T | Delhi |
| Raman | F | T | Mumbai |
| Rajan | F | F | Chennai |
This arrangement works out for answering the first two questions.
(ii) Assuming Raman always speaks the truth:
| I | II | City | |
| Ramu | F | F | Delhi |
| Raman | T | T | Mumbai |
| Rajan | T | T | Chennai |
(iii) Assuming Rajan always speaks the truth:
| I | II | City | |
| Ramu | F | F | Delhi |
| Raman | T | T | Mumbai |
| Rajan | T | T | Chennai |
Arrangement (ii) and (iii) help in answering the third question.
Raman belongs to Mumbai.
