The combination to the safe is 472. Two sequences define the same multiset if one can be obtained from the other by permuting the termsIn other words it is a sample of k elements from a set of n elements allowing for duplicates ie. Combination The number of ways to choose a sample of r elements from a set of n distinct objects where order does not matter and replacements are not allowed.
With combinations the ordering does not matter.
Two sequences define the same multiset if one can be obtained from the other by permuting the termsIn other words it is a sample of k elements from a set of n elements allowing for duplicates ie. All forms are read aloud n choose r. So in Mathematics we use more precise language. Combination A selection of objects from a collection.