(6) अलग-अलग हिंदी और (5) अलग-अलग अंग्रेजी पुस्तकों को पंक्ति में ऐसे रखा जाए कि कोई दो अंग्रेजी पुस्तकें साथ न हों। कितनी व्यवस्थाएं होंगी?
In how many ways can (6) distinct Hindi books and (5) distinct English books be arranged in a row so that no two English books are together?
Explanation opens after your attempt
A. (3628800)
Concept
Arrange Hindi books first in (6!) ways, then place (5) English books in (7) gaps in \(^{7}P_5\) ways. The total is \(6!\cdot^{7}P_5=1814400\).
Why this answer is correct
The correct answer is A. (3628800). Arrange Hindi books first in (6!) ways, then place (5) English books in (7) gaps in \(^{7}P_5\) ways. The total is \(6!\cdot^{7}P_5=1814400\).
Exam Tip
पहले हिंदी पुस्तकें (6!) तरीकों से रखें, फिर (7) gaps में (5) अंग्रेजी पुस्तकें \(^{7}P_5\) तरीकों से रखें। कुल \(6!\cdot^{7}P_5=1814400\) है।
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