How to get that answer:
If order mattered, then there would be 8*7*6 = 336 different permutations of sauces. I started with 8 and counted down by 1 until three slots were filled.
That 336 value would be the answer if order mattered; however, it does not matter. For any grouping of three, there are 3*2*1 = 6 ways to order that specific group. This indicates the 336 is too large by a factor of 6.
To fix this, we divide by 6 and we get 336/6 = 56
There are 56 ways to pick the 3 brands from the 8 overall brands to choose from.
