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.
binomial(30,20)*2^20/binomial(60,20)*6*binomial(16,5)/binomial(20,6)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random