document.write( "Question 691071: I have received 287 applications for a new program. Using a random number generator, we will randomly assign each application a number from 1 to 287 and rank the results. We will then select the top 20. There are two applications that we are concerned about. What is the probability that these 2 applications will both be selected in the Top 20? \n" ); document.write( "
Algebra.Com's Answer #426479 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! I have received 287 applications for a new program. Using a random number generator, we will randomly assign each application a number from 1 to 287 and rank the results. We will then select the top 20. There are two applications that we are concerned about. What is the probability that these 2 applications will both be selected in the Top 20? \n" ); document.write( "----- \n" ); document.write( "# of ways to succeed: 2C2*285C18 \n" ); document.write( "---- \n" ); document.write( "# of possible outcomes: 285C20 \n" ); document.write( "----- \n" ); document.write( "Prob = 285C18/285C20 \n" ); document.write( "= [285!/267!]/[285!/265!] = 265!/267! = 1/(267*266) \n" ); document.write( "= 0.00001408 \n" ); document.write( "================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "================== \n" ); document.write( " |