Determine whether the scenario below involves permutations or combinations. At a family gathering, 23 people are trying to fit into several cars. Your car holds 6 people. How many different groups of 6 could you take in your car?
order does not matter, so combination. it doesn't matter what order they get in to the car.
Oh so if the order matters the its permutations?
now i bet it is clear how to get \[\dbinom{26}{6}\] a rather large number.
yes if order matters it is permutations. if order does not, combinations. so 'committees' etc always combinations.
of course you have to use common sense and determine for your self whether order matters or not. I failed to have that common sense on your first question about 'itineraries'. that was a permutation because traveling first to city A and then to city B is counted differently from first B and then A.
Okay , this makes sense . Its okay, Im just glad that I know now thx
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