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    Question

    Out of 6 numbers, the sum of the first 5 numbers is 7

    times the number. If their average is 136, then the 6th number is:
    A 116 Correct Answer Incorrect Answer
    B 102 Correct Answer Incorrect Answer
    C 96 Correct Answer Incorrect Answer
    D 84 Correct Answer Incorrect Answer

    Solution

    Average of 6 numbers = 136 (average = sum of terms/number of terms) Sum of 6 numbers = 136 × 6 = 816 ---(1) Let the 6th number be x. Sum of 5 numbers = 7x From eq(1), 7x + x = 816 x = 816/8 = 102 The 6th number is 102.

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