Hi,         

Note: The probability of x successes in n trials is: 

P = nCx*  where p and q are the probabilities of success and failure respectively. 

10.3% of students in statistics actually take the course because they want to

In this case p = .103 & q = .897

nCx = 

P( 2 randomly selected, taking stat because they wanted to) = (.103)^2 = .0106 

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