Average/mean problem / IEEE754 floating points I'm trying to make an avg of floating point numbers in c++.   
I've got the input numbers and a result that I need to predict somehow.   
When calculated in c++ it differs from the result.   
Example:(0.08022724837064743+0.08679691702127457+0.07615235447883606+0.09822056442499161+0.07669658958911896+0.019331268966197968+0.060919374227523804+0.05298513546586037+0.06239578500390053+0.061483241617679596)/10  


The c++ compíler gives 0.06752084195613861100 but the result I've got is (the one I need to predict) is 0,0675208568572998.  


Already tried (x1\*0.1) + (x2 \* 0.1) ... + (xn \*0.1)   
and (x1 / 10) + (x2 / 10) ... + (xn/10).  


Thanks for reading / helping.  