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      Question

      The average of 12 numbers is 120. The average of the

      first 7 numbers is 75 and the average of the last 4 numbers is 53. What is the 8th number?
      A 530 Correct Answer Incorrect Answer
      B 690 Correct Answer Incorrect Answer
      C 446 Correct Answer Incorrect Answer
      D 703 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Total sum of 12 numbers = 12 ├Ч 120 = 1440 Sum of first 7 numbers = 7 ├Ч 75 = 525 Sum of last 4 numbers = 4 ├Ч 53 = 212┬а According to question, => 1440 тАУ (525 + 212) = 703

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