GRE Sample Test 3 Quantitative Reasoning 2

Use the weighted average formula: (average of 2007) × (weight of 2007) + (average of 2008) × (weight of 2008). We are given the averages,so let’s find the weights. The weight of 2007 is approximately

55

(55+72)

= 43.
The weight of 2008 is thus approximately .57. Now, use the formula: 1,210(.43) + 1,400(.57) = 524 + 798 = 1,322.