
Averages: 1. Simple Average = Sum of elements/number of elements
2. Weighted Average = (w1x1 + w2x2 + w3x3 + .... + wnxn )/ w1 + w2 + .... + wn

Post the important formulas useful for last minute revision for 22nd November!!
Averages: 1. Simple Average = Sum of elements/number of elements
2. Weighted Average = (w1x1 + w2x2 + w3x3 + .... + wnxn )/ w1 + w2 + .... + wn