Mean of 12 observation is 17 if each observation is increased by 2 find new mean
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(12×17 + 24)/12 solve this u will geet the answer
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Whenever mean of some numbers is given, and then each of the numbers is increased by a specific number, then the mean also gets increased by that number. If you want to prove, then:-
(x1+x2+......+xn) ÷n = old mean
(x1+2+x2+2+....+xn+2)÷n =new mean
(x1+2+x2+2+....+xn+2)÷n=new mean
(x1+x2+....xn)÷n +(2n)÷n= new mean
Old mean + 2=new mean
Hence proved
(x1+x2+......+xn) ÷n = old mean
(x1+2+x2+2+....+xn+2)÷n =new mean
(x1+2+x2+2+....+xn+2)÷n=new mean
(x1+x2+....xn)÷n +(2n)÷n= new mean
Old mean + 2=new mean
Hence proved
dikshabhat2215:
You can now put the values in it
Third step has been repeated..its not needed....sry
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