alleryबिल्कुल दो स्विच A–D चालू हैं। चार दावे किए गए हैं: स्विच A बंद है या B चालू है, या दोनों; C और D एक ही स्थिति में हैं; बिल्कुल A और C में से एक चालू है; B बंद है। बिल्कुल 3 दावे सच हैं। कौन से दो स्विच चालू हैं?
AAB
BAD
CBC
DCD
Answer & Solution
Correct answer: A. AB
AB अकेले चार दावों को सत्य, सत्य, सत्य, असत्य, बिल्कुल तीन सत्य बनाता है।
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