document.write( "Question 1147713: if it rains, an umbrella salesman can earn 20$ per day .if it's fair day he loses 5$ per day .What is his expectations if the probability of rain is 0.3? \n" ); document.write( "

Algebra.Com's Answer #769063 by ikleyn(52814) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "His expectation is  20*0.3 + (-5)*(1-0.3) = 20*0.3 - 5*0.7 = 2.5 dollars.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );