Question

use the formular nCr to evaluate the expression.8C5/4C3

Answer 1

\[nCr = nPr/r! => n!/((n-r)!r!)\]

Answer 2

I always go to pascals triangle

Answer 3

8C5 = 8!/(3!5!) = (8*7*3!)/3! = 56
4C3 = 4!/(3!) = 4*3!/3! = 4
8C3/4C3 = 56/4 = 14

Answer 4

And then how do you figure out the whole answer because isn't it suppose to come to one answer all toghether?

Answer 5

because it's only suppose to be one answer because it's a fraction the 8c5 is on top and the 4c3 is on bottom

Answer 6

1 4 6 4 1 <-- 4C3 = 4
1 5 10 10 5 1
1 6 15 20 15 6 1
1 7 21 35 35 21 7 1
1 8 28 56 70 56 28 8 1 <-- 8C5 = 56

56/4=14

Of course I would only list P's Triangle when I can do it faster than cyter's way

Answer 7

Ok thanks

Answer 8

ur welcome!