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    Question

      If x + y + z = 400 and x : y : z = 1 : 1 : 2, then

    what is the value of z?
    A 150 Correct Answer Incorrect Answer
    B 200 Correct Answer Incorrect Answer
    C 120 Correct Answer Incorrect Answer
    D 100 Correct Answer Incorrect Answer

    Solution

    Let the value of x, y and z be a, a, and 2a ⇒ x + y + z = 400 [Given] ⇒ a + a + 2a = 400 ⇒ a = 100 ⇒ The value of z = 2a = 200 ∴ The value of z is 200.

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