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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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