document.write( "Question 166578: A single die is tossed thirteen times. Find the probability that exactly eleven of the tosses show a \"three.\" \n" ); document.write( "
Algebra.Com's Answer #122771 by edjones(8007)![]() ![]() You can put this solution on YOUR website! The chance of a 3 on one toss is 1/6 \n" ); document.write( "Let a=5/6 and b=1/6 \n" ); document.write( "(a+b)^13 \n" ); document.write( "a^2b^11 is the term we need. \n" ); document.write( "the coefficient of this term is nCr=13C11=78 \n" ); document.write( "78a^2b^11 \n" ); document.write( "=78*(5/6)^2*(1/6)^11 \n" ); document.write( "=325/2176782336 or 1.49303*10^-7 A very small number, indeed. \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " \n" ); document.write( " |