(adsbygoogle = window.adsbygoogle || []).push({}); The Sum Of....Σ

So we were given this awkward question to do out of the text book... and a classmate and I arrived at similiar answers.... for part of the question, we are supposed to right a sequence into "sum notation"

Could somebody please tell me if my notation is correct?

Say... we have a binomial random variable... X ~ binomial (n, p)

P(X ≥ k) = P(X=k) + P(X = k +1) + ...... + P(X = n)

= (nCk)(p^k)(1-p)^n-k + (nCk+1)(p^k+1)(1-p)^n-(k+1)

= "the sum of i = k to the n" (nCi)(p^i)(1-p)^n-1

I know its messy... but"the sum of i = k to the n" (nCi)(p^i)(1-p)^n-1

but im looking to see if thats right?

Thanks

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# Homework Help: The Sum Of Σ

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