fahima17 fahima17
  • 04-01-2015
  • Mathematics
Answered

to increase the mean of 4 numbers by 2. by how much would the sum of the 4 numbers have to increase?



Answer :

apologiabiology
apologiabiology apologiabiology
  • 04-01-2015
so mean also translates to average so
the mean of 4 numbers is aprox
x=average
(x+x+x+x)/4=average
to increase x by 2 you add 2
x+2=average
(x+2+x+2+x+2+x+2)=4=(4x+8)/4=x+2

you would have to increase the sum/total by 8 to make the numbers' averages' go up by 2
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