Binomial probability formula help?

The formula is P(x)=nCx(probability)(1-probability)^n-x......my question is the combination part. Do you take n^x or what to get a number for nCx?

≈ nohglf2012-10-14T20:47:07Z

Favorite Answer

n C x is the combinations symbol

It is the number of ways you can select 'x' objects from a set that has 'n' objects

The formula is

n C x = n! / [(n - x)! x!]

where "!" is the factorial symbol

Niraj2012-10-15T03:46:20Z

do you know term factorial(!),if it is 1!=1 2!=2*1 3!=3*2*1 now ncX means n!/(x!*(n-x)!)...