When x is added to each of 13, 19, 16 and 23, then the numbers so obtained, in this
When x is added to each of 13, 19, 16 and 23, then the numbers so obtained, in this
order, are in proportion. Then, if 5x : y :: y : (8x-4), and y > 0, what is the value of y?
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Correct answer: (D) 30