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      Question

      The average of five positive numbers is 56. If the first

      number is three-fourth of the sum of the last four numbers, then the average of the last four numbers is:
      A 40 Correct Answer Incorrect Answer
      B 50 Correct Answer Incorrect Answer
      C 30 Correct Answer Incorrect Answer
      D 35 Correct Answer Incorrect Answer

      Solution

      Average of 5 numbers =56 first number is three-fourth of the sum of the last four numbers. Now, Let the sum of last four numbers be 4x   First number = 3x Sum of all the elements- 4x + 3x = 56 x 5 7x = 280   x = 40.   The average of the remaining four numbers = 4x/4 = 40

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