Practicing Success
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The average of seven numbers is 20. If 2 is subtracted from each number, then what will the new average be? |
22 10 9 18 |
18 |
Sum of 7 numbers = 7 × 20 = 140 New sum = 140 - 7 × 2 = 140 - 14 = 126 Average = \(\frac{126}{7}\) = 18 |
