शब्द (BOOK) में (4) अक्षर हैं और (O) दो बार आता है। इसके अलग-अलग arrangements कितने होंगे?
The word (BOOK) has (4) letters and (O) occurs twice. How many distinct arrangements are possible?
Explanation opens after your attempt
Correct Answer
C. (12)
Concept
Because two (O)'s are identical, arrangements are \(\frac{4!}{2!}=12\). For identical objects, divide by their factorial.
Why this answer is correct
The correct answer is C. (12). Because two (O)'s are identical, arrangements are \(\frac{4!}{2!}=12\). For identical objects, divide by their factorial.
Exam Tip
दो समान (O) होने से व्यवस्थाएँ \(\frac{4!}{2!}=12\) होंगी। समान वस्तुओं के लिए factorial से भाग दें।
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