document.write( "Question 1113098: At one high school, the probability that a student is absent today, given that the student was absent yesterday, is 0.12. The probability that a student is absent today, given that the student was present yesterday, is 0.05. The probability that a student was absent yesterday is 0.1. Draw a tree diagram to represent the situation. What is the probability that a randomly selected student was present yesterday and today?
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #728153 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
At one high school, the probability that a student is absent today, given that the student was absent yesterday, is 0.12. \r
\n" ); document.write( "\n" ); document.write( "The probability that a student is absent today, given that the student was present yesterday, is 0.05.\r
\n" ); document.write( "\n" ); document.write( " The probability that a student was absent yesterday is 0.1.\r
\n" ); document.write( "\n" ); document.write( " Draw a tree diagram to represent the situation. What is the probability that a randomly selected student was present yesterday and today?
\n" ); document.write( "-----
\n" ); document.write( "From a root (point) you draw branches present(0.9) and absent(0.1)
\n" ); document.write( "From the present branch you draw present(0.95) because absent is (0.05)
\n" ); document.write( "-----
\n" ); document.write( "Ans: P(present| present) = 0.95*0.9 = 0.855
\n" ); document.write( "------------
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "------------
\n" ); document.write( " \n" ); document.write( "
\n" );