Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
Sum[(1/k) Binomial[n, k] p^k (1 - p)^(n - k), {k, 1, n}]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
