Question 889464
This is a combination problem of 20 things taken 6 at a time
combination of 20 things taken 6 at a time = 20! / (6! * (20-6)!)
combination of 20 things taken 6 at a time = 20*19*18*17*16*15 / 6*5*4*3*2*1
combination of 20 things taken 6 at a time = 38760