RBI Assistant Prelims practice question
Statements: All doctors are houses. No houses are birds. Conclusions: I. No houses are doctors II. Some houses are doctors. Which of the conclusions follow(s) from the statements?
From a RBI Assistant Prelims Reasoning practice set · Reasoning
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Correct answer: (B) Only conclusion II follows
Statements: All doctors are houses. No houses are birds. Conclusion I: "No houses are doctors." is true in some cases consistent with the statements but false in others (or never true), so it does not definitely follow. Conclusion II: The given statements guarantee at least some overlap between houses and doctors in every possible case, so "Some houses are doctors." definitely follows. So: Only conclusion II follows.
हिंदी में प्रश्न
कथन: सभी डॉक्टर, घर हैं। कोई घर, पक्षी नहीं है। निष्कर्ष: I. कोई घर, डॉक्टर नहीं है II. कुछ घर, डॉक्टर हैं। कथनों से कौन सा/से निष्कर्ष अनुसरण करता/करते है/हैं?
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सही उत्तर: (B) केवल निष्कर्ष II अनुसरण करता है
कथन: सभी डॉक्टर, घर हैं। कोई घर, पक्षी नहीं है। निष्कर्ष I: "कोई घर, डॉक्टर नहीं है।" कथनों के अनुरूप कुछ स्थितियों में सत्य हो सकता है पर सभी में नहीं (या कभी नहीं), इसलिए यह निश्चित रूप से अनुसरण नहीं करता। निष्कर्ष II: दिए गए कथनों के अनुरूप हर संभावित स्थिति में "कुछ घर, डॉक्टर हैं।" सत्य है, इसलिए यह निश्चित रूप से अनुसरण करता है। अतः: केवल निष्कर्ष II अनुसरण करता है।
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