Posted by mary on .
the mean of a list of seven numbers is 45. if i add two numbers to this list the mean of he list becomes 37 what is the mean of the two numbers that i added to the list

math 
Reiny,
Sum of the seven number = 7(45) = 315
after adding 2 more the sum is now 9(37) or 333
so the sum of the two numbers added must have been 18
or their average (mean) must have been 18/2, which is 9