Combinations: Calculate C(6, 3) - How to Choose 3 Items from 6

C(6, 3) represents the number of ways to choose 3 items from a set of 6 items without regard to the order.

Using the formula for combinations, C(n, r) = n! / (r! * (n-r)!), we can calculate C(6, 3) as follows:

C(6, 3) = 6! / (3! * (6-3)!) = (6 * 5 * 4 * 3 * 2 * 1) / ((3 * 2 * 1) * (3 * 2 * 1)) = (6 * 5 * 4) / (3 * 2 * 1) = 120 / 6 = 20

Therefore, C(6, 3) = 20.