23/Jan Math RECALL-Best gmat prep 2022(8)

WHAT IS RECALL?

RECALL is real exam questions according to latest examinee’s recall (REQALER).

PS Question: Sell 120 things, the first 100 are sold at x, the last 20 are sold at y, Q: What is the profit/cost? (List the following expressions, and then convert the conditions to see if the unknowns can be offset.