(7) अलग-अलग पत्रों को (7) अलग-अलग लिफाफों में एक-एक रखकर कितने तरीकों से बांटा जा सकता है?
In how many ways can (7) distinct letters be placed one each in (7) distinct envelopes?
Explanation opens after your attempt
A. (5040)
Concept
The number of one-to-one placements is (7!=5040). In exams, distinct envelopes mean arranging the letters.
Why this answer is correct
The correct answer is A. (5040). The number of one-to-one placements is (7!=5040). In exams, distinct envelopes mean arranging the letters.
Exam Tip
एक-एक मिलान की संख्या (7!=5040) होती है। परीक्षा में distinct envelopes हों तो letters की arrangement करें।
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