Answer
Pascal's triangle
Work Step by Step
A triangle that shows the binomial coefficients ${n}\choose {k}$ is called Pascal's Triangle.
Thus, the missing expression in the given statement is:
Pascal's triangle
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.