(10) व्यक्तियों की पंक्ति में (A), (B) से पहले और (B), (C) से पहले आए, ऐसी कितनी व्यवस्थाएं हैं?
In a row of (10) people, how many arrangements have (A) before (B) and (B) before (C)?
Explanation opens after your attempt
Correct Answer
B. (604800)
Concept
Among the (3!) relative orders of (A,B,C), only one is valid, so the count is (10!/3!). For relative order, divide by the number of possible orders.
Why this answer is correct
The correct answer is B. (604800). Among the (3!) relative orders of (A,B,C), only one is valid, so the count is (10!/3!). For relative order, divide by the number of possible orders.
Exam Tip
(A,B,C) के (3!) सापेक्ष क्रमों में केवल एक क्रम मान्य है, इसलिए (10!/3!) होगा। सापेक्ष क्रम में कुल क्रमों से भाग दें।
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