Fill in the blanks
An ordering of $ n $ elements is called a ________ of the elements.
The number of ________ ________ of objects is given by $ \dfrac{n!}{n_1!n_2!n_3! \cdots , n_k!} $.
The number of combinations of $ n $ elements taken $ r $ at a time is given by the formula ________.
In Exercises 7 - 14, determine the number of ways a computer can randomly generate one or more such integers from 1 through 12.
An even integer
An integer that is greater than $ 9 $.
An integer that is divisible by $ 3 $.