Question

WILL MARK BRAINLIEST. Which of the following demonstrates how the first 21 (on the left side of the triangle) is calculated using the combination pattern?

Answer 1

Answer:

That would be C.

Step-by-step explanation:

7C2 = 7! / (7-2)! * 2!

7C2  = 7*6*5*4*3*2*1 / 5*4*3*2*1 * 2*1

= 7*6 / 2

= 21