(9) अलग-अलग पुस्तकों को पंक्ति में रखना है। तीन विशेष पुस्तकें साथ न रहें यानी तीनों एक ही ब्लॉक में न आएं। कितनी व्यवस्थाएं होंगी?
(9) distinct books are to be arranged in a row. Three particular books should not all be together as one block. How many arrangements are possible?
Explanation opens after your attempt
A. (322560)
Concept
Subtract cases where the three particular books are together, \(7!\cdot3!\), from total (9!). The answer is (362880-30240=332640).
Why this answer is correct
The correct answer is A. (322560). Subtract cases where the three particular books are together, \(7!\cdot3!\), from total (9!). The answer is (362880-30240=332640).
Exam Tip
कुल (9!) में से तीनों विशेष पुस्तकों के साथ वाले \(7!\cdot3!\) cases घटाएं। उत्तर (362880-30240=332640) है।
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