MathDB
22 black & 3 blue balls

Source: 0

April 23, 2009

Problem Statement

There are 22 black and 3 blue balls in a bag. Ahmet chooses an integer n n in between 1 and 25. Betül draws n n balls from the bag one by one such that no ball is put back to the bag after it is drawn. If exactly 2 of the n n balls are blue and the second blue ball is drawn at nth n^{th} order, Ahmet wins, otherwise Betül wins. To increase the possibility to win, Ahmet must choose
<spanclass=latexbold>(A)</span> 2<spanclass=latexbold>(B)</span> 11<spanclass=latexbold>(C)</span> 12<spanclass=latexbold>(D)</span> 13<spanclass=latexbold>(E)</span> 23<span class='latex-bold'>(A)</span>\ 2 \qquad<span class='latex-bold'>(B)</span>\ 11 \qquad<span class='latex-bold'>(C)</span>\ 12 \qquad<span class='latex-bold'>(D)</span>\ 13 \qquad<span class='latex-bold'>(E)</span>\ 23