udaymathapati wrote:

Mr Tolstoy bought 100 CDs at $x and sold them at $y. Did Mr Tolstoy profit from the deal?

1. 40% of x > 30% of y

2. 30% of x > 40% of y

Request bunuel to explain with detail. I am finding it difficult to decipher the explaination given belw.

stmt1> we get, x>0.75. Thus, x=0.8y>0.75y, which case y>x and Mr Tolstoy made a profit or x=2y >0.75y, in which case, he did not make profit. Thus we can't conclude whether he made a profit or not.

Mr. T would make a profit if \(X<Y\) or \(\frac{X}{Y} < 1\),

Mr. T would incur a loss if \(X>Y\) or \(\frac{X}{Y} > 1\).

S1: 40% of x > 30% of y, so \(4X > 3Y\) or \(\frac{X}{Y} > \frac{3}{4}\), but is it greater than 1? we dont know.

Not sufficient.S2: 30% of x > 40% of y, so \(3X > 4Y\) or \(\frac{X}{Y} > \frac{4}{3}\), which is clearly greater than 1. So Mr. T incurred a loss.

SufficientAnswer:

B _________________

Respect,

Vaibhav

PS: Correct me if I am wrong.