It's 6!=720.
The formula for circular permutation is given by (n-1)!
This is because of the fact that in a circular setting if you move each of the person one way right or left, you still get the same arrangement, and we can do so n times until we get back to the first arrangement.
We can write this in algebraic terms as:
16+8x = 24+6x
so
2x = 8
x = 4
The number is 4.
Answer:
the answer is c.
Step-by-step explanation:
4 x 5 + 7 x 7 = 69
4 x 3 + 7 x 9 = 75
Step-by-step explanation:
7 and 4 are solutions the others not