The answer is in the red part but the work is everything on top.
<span>When order does not matter you use what is called n choose k formula
n!/(k!(n-k)!) where n is the number of things to choose from and k is the number of choices made, in this case:
20!/(4!(20-4)!)=4845</span>
Answer:
C. x = 6, y = –3
Step-by-step explanation:
I just took the test and got it right :)