JEE Main 2017 — Permutation Combination Question with Solution
JEE Main 2017 (09 Apr Online)
Question
The number of ways in which boys and girls can be seated on a round table if a particular boy and a particular girl never sit adjacent to each other, is:
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Number of ways = Total when sit together
Total ways in which people can be arranged is
Now, when sit together the number of ways (other and grouped together) is
Hence, the required numer of ways is
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This is a previous-year question from JEE Main 2017, covering the Permutation Combination chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.