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.
((17.6 + 17.1)/2 + (17.4 + 17.4)/2)/2
((17.6 + 17.1)/2 + (17.4 + 17.4)/2)/2
Natural Language
Math Input
Extended Keyboard