**Solution A,**

you can use two arrays. One for the numbers one for the corresponding weights.

C#

public double[] _number = new double[] {67,54,98}; public double[] _weights = new double[] {32,12,45}; then: double _wavg = 0; for(int i = 0; i < _number.Count(); i++) { _wavg += ((_number[i] * _weight[i]) / (_weights.Sum()) }

Solution B,

You can use a predefined class to store your numbers end weights

C#

public class WeightedNumber { public double Number {get; set; } public double Weight{get; set; } } List<wightednumber> _numbers;</wightednumber>

The rest looks more or less the same

--RA

—SA