Question

how many counting numbers have three distinct nonzero digits such that the sum of the three digits is 7?

Answer 1

The number 124 works, can't think of another.

(1+2+4 = 7)

Answer 2

there are a number of ways you can make a sum of 7
124 and sa me numbers in a different order

Answer 3

neither can I

Answer 4

Oh right, the order matters too.

Answer 5

yes there are 6 ways of ordering 124

Answer 6

Can someone help me when your done here?

Answer 7

So i guess the question would be in how many ways can you rearrange 124, which you probably know how to do by now.

Answer 8

yes its 3! which is 3*2*1

Answer 9

So the actual number is 3? Because that's how many times it could be rewritten