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    Question

    Three numbers ‘A’, ‘B’ and ‘C’ are such

    that ‘A’ is double of ‘B’ and ‘C’ is equal to the average of ‘A’ and ‘B’. If the sum of these three numbers is 630, then find the value of ‘C’.
    A 210 Correct Answer Incorrect Answer
    B 140 Correct Answer Incorrect Answer
    C 280 Correct Answer Incorrect Answer
    D 180 Correct Answer Incorrect Answer

    Solution

    Let the value of ‘B’ be ‘2x’ So, value of ‘A’ = 2 × 2x = ‘4x’ So, value of ‘C’ = (4x + 2x)/2 = 6x/2 = ‘3x’ ATQ; 4x + 2x + 3x = 630 Or, 9x = 630 Or, x = 70 So, the value of ‘C’ = 3x = 3 × 70 = 210 Let the value of ‘B’ be ‘2x’ So, value of ‘A’ = 2 × 2x = ‘4x’ So, value of ‘C’ = (4x + 2x)/2 = 6x/2 = ‘3x’ ATQ; 4x + 2x + 3x = 630 Or, 9x = 630 Or, x = 70 So, the value of ‘C’ = 3x = 3 × 70 = 210

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