Quantitative Comparison Practice Test 3

Solutions (43−46):
Average of nine numbers = 30
Average of first five numbers = 25
Average of last three numbers = 35
Sum of nine numbers = 9 × 30 = 270
Sum of five numbers = 5 × 25 = 125
Sum of three numbers = 3 × 35 = 105
Sixth number = Sum of nine numbers − Sum of the first five numbers − Sum of the last three numbers
= 270 − 125 − 105 = 40
43. So, Column B is greater than Column A.