शब्द (BANANA) के अक्षरों की कितनी व्यवस्थाएं होंगी जिनमें दोनों (N) साथ आएं?
How many arrangements of the letters of (BANANA) are possible in which both (N)'s are together?
Explanation opens after your attempt
A. (20)
Concept
Treat the two (N)'s as one block, giving units (NN,B,A,A,A). The number is \(\frac{5!}{3!}=20\).
Why this answer is correct
The correct answer is A. (20). Treat the two (N)'s as one block, giving units (NN,B,A,A,A). The number is \(\frac{5!}{3!}=20\).
Exam Tip
दो (N) को एक ब्लॉक मानें तो इकाइयां (NN,B,A,A,A) हैं। संख्या \(\frac{5!}{3!}=20\) होगी।
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