document.write( "Question 959361: there are 3 friends in a class. The teacher calls 2 out of 21 kids at random. What is the probability tht 2 of the friends are called \n" ); document.write( "
Algebra.Com's Answer #586402 by stanbon(75887) ![]() You can put this solution on YOUR website! there are 3 friends in a class. The teacher calls 2 out of 21 kids at random. What is the probability tht 2 of the friends are called \n" ); document.write( "--- \n" ); document.write( "# of ways to succeed:: 3C2 = 3 \n" ); document.write( "# of possible outcomes:: 21C2 = 210 \n" ); document.write( "----- \n" ); document.write( "P(choose 2 friends) = 3/210 = 1/70 \n" ); document.write( "--------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "----------- \n" ); document.write( " |