GMAT Data Sufficiency (DS) | Re: Devil's Dozen!!!

HI RAN

I think I can elaborate you the details . At first i opted Option C. But its not correct. you said that while calculating the required probability numerator is one always. No its Not..Both numerator and denominator is changing, yet maintains fixed value of probability for a given n, irrespective of K value.

Let me explain by taking an example and evaluate the question from the beginning.
let K= {1,2,3,4} and n=2. as per question we need to take 2 numbers from K one by one and check
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