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Class 11MathematicsPermutations and CombinationsPermutationsExpert
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In how many ways can (8) people sit around a circular table if exactly (1) person is between (A) and (B)?

Answer and explanation

Correct answer: (1440)

Fix (A), then (B) has (2) possible positions and the remaining (6) people arrange in (6!) ways. For circular gaps, fixing one person is easiest.

Related tags

PermutationsCircular SeatingPosition GapPermutations And CombinationsMathematicsClass 11 Mcq
सुधार सुझाएँ / Earn

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  5. 5Three distinct prizes are to be awarded to seven students. No student can receive more than one prize. How many ways are possible?
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  7. 7What is the value of \(\frac{21!}{19!\cdot2!}-\frac{18!}{16!\cdot2!}\)?
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  9. 9What is the value of \(\frac{22!}{20!\cdot 2!}-\frac{21!}{20!}\)?
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