### Home > CCG > Chapter 12 > Lesson 12.1.3 > Problem12-44

12-44.

Consider the sample space for flipping a coin $10$ times in a row. In how many sequences of heads and tails will $5$ of the $10$ coins show heads?

Does order matter?

Recall the formula for combinations: $\frac{n!}{(n!-r)^{!r!}}$