शब्द (REFER) में (R) दो बार और (E) दो बार आता है। अलग व्यवस्थाएँ कितनी होंगी?

In the word (REFER), (R) occurs twice and (E) occurs twice. How many distinct arrangements are possible?

Explanation opens after your attempt
Correct Answer

A. (30)

Step 1

Concept

The arrangements are \(\frac{5!}{2!2!}=30\). Do not count identical letters as different.

Step 2

Why this answer is correct

The correct answer is A. (30). The arrangements are \(\frac{5!}{2!2!}=30\). Do not count identical letters as different.

Step 3

Exam Tip

व्यवस्थाएँ \(\frac{5!}{2!2!}=30\) होंगी। समान अक्षरों को अलग-अलग न गिनें।

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शब्द (REFER) में (R) दो बार और (E) दो बार आता है। अलग व्यवस्थाएँ कितनी होंगी? / In the word (REFER), (R) occurs twice and (E) occurs twice. How many distinct arrangements are possible?

Correct Answer: A. (30). Explanation: व्यवस्थाएँ \(\frac{5!}{2!2!}=30\) होंगी। समान अक्षरों को अलग-अलग न गिनें। / The arrangements are \(\frac{5!}{2!2!}=30\). Do not count identical letters as different.

Which concept should I revise for this Mathematics MCQ?

The arrangements are \(\frac{5!}{2!2!}=30\). Do not count identical letters as different.

What exam hint can help solve this Mathematics question?

व्यवस्थाएँ \(\frac{5!}{2!2!}=30\) होंगी। समान अक्षरों को अलग-अलग न गिनें।