The solution given was: If the seats are numbered, it is as if
they are sitting in a row instead of in a circle, as rotating the
whole group results in a new position.
No. of ways = 7! x 3! = 30240
Happened to see this question, which is quite similar to the
previous question, but with different workings.
This is a very wrong answer, and it is very misleading. You
cannot see it as sitting in a row. This is very very wrong. There
will be some solutions missing.
This is a circle question. You are missing the solution where
two boys sit at one end and one boy at the other end (if we
consider a row). In a circle, they are still considered to be
sitting together, but in a row, they are not.
Where did you see this solution?