To find the number of ways arranging 10 people in a circular table,we use.a(10-1)! b.10!/(10-1)! c.1/2 10! d.1/2(10-1)! ?

The correct answer is b. 10!/(10-1)!

When arranging 10 people in a circular table, the number of ways can be calculated by treating the table as a line and arranging the people in a line first. This gives us 10! ways to arrange the people in a line. However, since the table is circular, we need to divide by the number of rotations that result in the same arrangement, which is 10 (since there are 10 people).

Therefore, the number of ways to arrange 10 people in a circular table is 10!/10 = 9! = 362,880.

b.10!/(10-1)!