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((46 choose i) * (0.7)^i * (0.3)^(46-i), i from 0 to 21)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random