document.write( "Question 1195870: A poll shows that 70% of all voters approve of the mayor's work. On three separate occasions a pollster selects a voter at random. What is the probability that on exactly one of these three occasions the voter approves of the mayor's work?\r
\n" ); document.write( "\n" ); document.write( "

\r
\n" );
document.write( "\n" );
document.write( "The explanation on aops was not detailed enough for me, especially the part where it says  
\n" );
document.write( "https://artofproblemsolving.com/wiki/index.php/2008_AMC_10B_Problems/Problem_17\r
\n" );
document.write( "\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #828459 by MathLover1(20850)  
You can put this solution on YOUR website!
 
\n" );
document.write( "if given that  % of all voters approve of the mayor's work, then % of all voters disapprove of the mayor's work\r
\n" );
document.write( "
\n" );
document.write( "\n" );
document.write( "using binomial distribution formula\r
\n" );
document.write( "
\n" );
document.write( "\n" );
document.write( "\r
\n" );
document.write( "\n" );
document.write( "we find the number of ways only  person approves () of the mayor multiplied by the probability  person approves() and people disapprove (  )\r
\n" );
document.write( "
\n" );
document.write( "
\n" );
document.write( "\n" );
document.write( "the number of ways only  person approves is  (is given)\r
\n" );
document.write( "
\n" );
document.write( "\n" );
document.write( " since 
\n" );
document.write( "=
\n" );
document.write( "=
\n" );
document.write( "=\r
\n" );
document.write( "
\n" );
document.write( "\n" );
document.write( " \n" );
document.write( "\n" );