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Question

Find the number of ways in which 3 girls and 2 boys can be seated around a circular table such that the two boys are not seated next to each other.

एक गोलाकार मेज के चारों ओर कितने तरीकों से 3 लड़कियां और 2 लड़के बैठ सकते हैं जिससे कि दो लड़के एक दूसरे के बगल में न बैठे?

A
4
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B
12
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C
6
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D
10
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Solution

The correct option is B 12
First, make three girls sit around the table and then make 2 boys sit. Hence, the required number of ways = 2! × 3C2 × 2! = 2 × 3 × 2 = 12.

पहले, मेज के चारों ओर तीन लड़कियों को बैठाएँ और फिर 2 लड़कों को बैठाएँ। अत: अपेक्षित तरीकों की संख्या = 2! × 3C2 × 2! = 2 × 3 × 2 = 12 है।

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