Question

Mean of n numbers x1,x2,x3,......,xn is m.If x1 is replaced by x',then find the new mean

Answer 1

Answer:

Mean ofn numbers =M

Sum of n numbers = Mn

If X 1 is replaced by x then sum = Mn−X 1 +x

Mean = Mn−X 1+x/n

Mean = Mn−X 1+x/n