What must be added to both the terms x and y so that their ratio becomes equal to p : q?
Explanation:
Let the required quantity be t
(x + t) : (y + t) = p : q
⇒ (x + t)q = (y + t)p
⇒ xq + qt = yp + pt
⇒ (p – q)t = xq – yp
∴ t = (xq - yp)/(p - q)
Hence, option (c).
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