शब्द (DAD) के अलग-अलग arrangements कितने हैं?
How many distinct arrangements are there for the word (DAD)?
Explanation opens after your attempt
A. (3)
Concept
(D) occurs twice, so there are \(\frac{3!}{2!}=3\) arrangements. Do not count repeated letters as distinct.
Why this answer is correct
The correct answer is A. (3). (D) occurs twice, so there are \(\frac{3!}{2!}=3\) arrangements. Do not count repeated letters as distinct.
Exam Tip
(D) दो बार है इसलिए \(\frac{3!}{2!}=3\) arrangements हैं। repeated letters को अलग-अलग न गिनें।
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