CA Foundation P3 · Chapter 5 · Question 4 of 9
In how many ways can 7 persons be seated around a circular table?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: A) 720
Explanation
For n persons around a circle the number of arrangements is (n − 1)!. Here (7 − 1)! = 6! = 720. 7! = 5,040 treats it as a row, and 360 = 6!/2 applies only to necklaces or garlands where clockwise and anticlockwise are the same.
More Basic Concepts of Permutations and Combinations MCQs
- Q6If ⁿP₂ = 90, then n is:
- Q7The number of diagonals of a polygon with 12 sides is:
- Q8In how many ways can the letters of the word ARTICLE be arranged so that the vowels occupy only the even positions?
- Q9If ⁿC₈ = ⁿC₁₂, then ⁿC₁₇ is equal to:
- Q1The number of different arrangements of the letters of the word LEDGER is: