Calculating a new average from a old average, without knowing the numbers.
I have to calculate a average based on a old average in a voteing system.
but each vote's value have not been stored only the actual vote as count
so what is availible to use is
Old average number : 50
Ammount of votes : 732
And now i want to add new values to that number when there have been
New vote value is between 1-75
a user votes 10.
so im guessing the calculation is something like this
(oldaverage + newvote) / (votecount + 1 new vote)
But it seems off.. any ideas (Worried)