If I have 5 different colored balls in a bag, how many
different groups of three can I pull out? (The order within the three does
not matter, i.e., red-blue-yellow is the same as yellow-blue-red.)
Correct answer:
Incorrect answers:
Interesting Info:
- There are 5 times 4 times 3 equals 60 ways (permutations) if order
matters. But if order does not matter, then we have to divide by six (3
times 2 times 1, the permutations of the three) to get the answer of 10,
the number of combinations of "5 things taken 3 at a time".
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