Question 1201922
You volunteer to help drive children at a charity event to the​ zoo, but you can fit only 6 of the 16 children present in your van. How many different groups of 6 children can you​ drive?
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The 1st choice is 1 of 16.
Then 1 of 15, then 14, etc.
---> 16*15*14 ... 11
The product of those 6 numbers.
But, choosing A, B, C, D, E and F is the same as choosing A, F, C, etc.
6*5*4*3*2*1 different ways = 720 ways for any combination.
Divide the big number by 720.
That's it.