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math for number of combinations. The number of combinations of n things taken r at a time is written as C n r. Introductory combination problems like if you have 5 friends and can pick 2 of them to join you on a boat ride how many different groups of friends could you take with you.
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8 items have a total of 40320 different combinations. The number of k-combinations for all k is the number of subsets of a set of n elements. Enter 4 for Number of sample points in each combination.
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The total number of combinations is then. A combination is a way of choosing elements from a set in which order does not matter. A formula for the number of possible combinations of r objects from a set of n objects. C n r n.
