Weighted average calculator

Compute the weighted average of a sequence a, based on a sequence with corresponding weights w - i-th element of the a sequence has a weight equal to the i-th element of the w sequence.
sequence a:
sequence w:
 Upload Excel or CSV file for batch operation: (read about supported files and formats)
  API URL: http://calculator.vhex.net/c/weighted-average (see documentation. JSONP is now available)