If p ≠ 1 and if qp/(q - p) = 1, what is the value of q in terms of p?	Choose one:
A) (p+1)/p B) (p - 1)/p C) p/(p + 1) D) p/(1-p) E) (1 - p)/p
This question comes with a particular 'quirk' (one that you probably won't see on Test Day). The GMAT won't test you on the concept of undefined numbers (re: numbers divided by 0), so any time that this concept is a possibility, the question writers have to add a restriction that removes the option that a 0 could occur in the denominator.   Here, we're told that B CANNOT = 1, which is a bit strange because that restriction doesn't seem to impact the original equation much. In fact, it impacts JUST ONE of the answer choices - so you have to ask WHY that restriction is even there. It's actually because that one answer is the correct one.   Final Answer:   p/(1-p)
<result>D</result>
If p ≠ 1 and if qp/(q - p) = 1, what is the value of q in terms of p?