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If the average of five numbers is -10, and the sum of three of the numbers is 16, then what is the average of the other two numbers?
  1. 20
  2. 5
  3. -1
  4. -33
Explanation

Sum of the 5 number = -10 * 5 = -50

Sum of the 3 numbers = 16

Sum of other 2 numbers = -50 - 16 = -66

Average of the 2 numbers = -66/2 = -33.

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