How many 3 number combinations for 1 through 9?

Answer 1

Nine options, no repeats, three slots.The equation for this is as follows:

9!/(3!*(9-3)!)

9*8*7*6*5*4*3*2*1 / (3*2*1)*(6*5*4*3*2*1)

= 9*8*7 / 3*2*1

= 504 / 6

= 252 / 3

= 84

84 combinations.