(6) लड़कों और (4) लड़कियों को पंक्ति में ऐसे कितने तरीकों से बैठाया जाए कि सभी लड़कियां साथ बैठें?
In how many ways can (6) boys and (4) girls be seated in a row so that all girls sit together?
Explanation opens after your attempt
B. (120960)
Concept
Treat the four girls as one block, then there are (7) units. The total arrangement is \(7!\cdot4!=120960\).
Why this answer is correct
The correct answer is B. (120960). Treat the four girls as one block, then there are (7) units. The total arrangement is \(7!\cdot4!=120960\).
Exam Tip
चार लड़कियों को एक ब्लॉक मानें, तब (7) इकाइयां हैं। कुल व्यवस्था \(7!\cdot4!=120960\) है।
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