शब्द (NUMBER) के अक्षरों की व्यवस्थाओं में (N) और (R) सिरों पर हों, ऐसी कितनी व्यवस्थाएं हैं?
In arrangements of the letters of (NUMBER), how many have (N) and (R) at the two ends?
Explanation opens after your attempt
Correct Answer
B. (48)
Concept
(N) and (R) can occupy the ends in (2!) ways, and the remaining (4) letters in (4!) ways. With end restrictions, fill the ends first.
Why this answer is correct
The correct answer is B. (48). (N) and (R) can occupy the ends in (2!) ways, and the remaining (4) letters in (4!) ways. With end restrictions, fill the ends first.
Exam Tip
(N) और (R) सिरों पर (2!) तरीकों से होंगे और शेष (4) अक्षर (4!) तरीकों से। सिरों पर शर्त हो तो पहले सिरों को भरें।
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