Hi All,
We're told that the profit from the sale of a certain appliance increases, though NOT proportionally, with the number of units sold. We're asked if the profit exceeded $4 million on sales of 380,000 units. This is a YES/NO question. This is a great example of a 'concept question', meaning that you don't actually have to do any math to solve it (as long as you understand the concept(s) involved).
1) The profit exceeded $2 million on sales of 200,000 units.
We're told that profit increases, but NOT proportionately as sales increases. Thus, we know that 380,000 units sold would be MORE profitable than 200,000 units sold (thus, the profit would be GREATER than $2 million). However, we don't know how much greater - the profit could be less than $4 million (a 'NO' answer), $4 million exactly (also a 'NO' answer) or greater than $4 million (a 'YES' answer)
Fact 1 is INSUFFICIENT
2) The profit exceeded $5 million on sales of 350,000 units.
With Fact 2, we know that $5 million in profit occurred when 350,000 units were sold, so the profit for 380,000 units WILL be higher than $5 million. Even though we don't know the exact amount that the profit will be, we DO know that it will be GREATER than $5 million - so the answer to the question is ALWAYS YES.
Fact 2 is SUFFICIENT
Final Answer: B
GMAT assassins aren't born, they're made,
Rich
