Sum[ ((0.3)^k) * ((1 - 0.3)^(6 - k)) * Binomial[ 6, k ], { k, 0, 4 } ]

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.