document.write( "Question 388848: There are 21 students in Mrs. Smith’s algebra class. Mrs. Smith randomly chooses 3 students to work problems on the board each day. What is the probability that Carly will be asked to work a problem today if one student is absent? \n" ); document.write( "
Algebra.Com's Answer #275248 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! There are 21 students in Mrs. Smith’s algebra class. Mrs. Smith randomly chooses 3 students to work problems on the board each day. What is the probability that Carly will be asked to work a problem today if one student is absent? \n" ); document.write( "----------------- \n" ); document.write( "1 - P(all three are chosen from the remaining 19 students) \n" ); document.write( "--- \n" ); document.write( "= 1 - 19C3/20C3 \n" ); document.write( "= 1 - 0.85 \n" ); document.write( "= 0.15 \n" ); document.write( "====================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |