Lana bought two lots last year and sold both of them yesterday. If the selling
price of lot B was twice that of lot A, did Lana make a profit on the sale of
these two lots?
(1) Lana sold lot A for 20% more than its purchase price.
(2) Lana sold lot B for more than 90% of its purchase price.
From Q we know that
B = 2A : Selling prices
(1) tells that if PA is purchase price of A, she got (PA + PA*.2).
This indicated the profit, but only for A.
B = 2 (PA + 0.2PA) , but we dont know what purchase price of B.
(2) This says that B > 0.9 * PB, even if she sells for 100%, there is no profit on B's sell
we end up with say PB = 2.4PA, which is insuff,
Ans should be E