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.
1-(42+choose+6)/(45+choose+6)*(38+choose+5)/(41+choose+5)*(38+choose+5)/(41+choose+5)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random