If m kg of metal x are melted with n kg of metal y, to form an alloy, it weighs a kg. If i kg of metal x are melted with j kg of metal y, to form an alloy, it weighs a kg. Which one of the following expressions is true?
(a) mx - ny = ix - jy
(b) mx + ix = jy + ny
(c) x / y = m / n = i / j
(d) x / y = mx / my
(e) x/y = (j - n)/(m - i)
Free GMAT Question Solution:
Explanation:
mx + ny = ix + jy (as both weigh a kg)
mx - ix = jy - ny
x (m - i) = y (j - n)
x/y = (j - n)/(m - i)
Answer is (E)
