document.write( "Question 359452: the mean of a set of numbers is 120. if one number is increases by 300, the mean increases to 135. how many numbers are in the set? \n" ); document.write( "
Algebra.Com's Answer #256517 by edjones(8007)![]() ![]() You can put this solution on YOUR website! Let x=numbers in the set. \n" ); document.write( "(120(x-1)+420)/x=135 \n" ); document.write( "(120x-120+420)/x=135 \n" ); document.write( "(120x+300)/x=135 \n" ); document.write( "120x+300=135x \n" ); document.write( "15x=300 \n" ); document.write( "x=20 numbers in the set. \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |