Question

Mean of 8 observations is 25 if one observation 11 is excluded, find the mean of the remaining

Answer 1

New mean will be =( (25 × 8 ) -11 )/ 7 = 27 ..o think it is correct ..☺☺☺

Answer 2

Answer:

27

Step-by-step explanation:

We are given that Mean of 8 observations is 25

Mean =( Sum of all observations)/(Total no. of observations)

25  = ( Sum of all observations)/8

25*8  =Sum of all observations

200  =Sum of all observations

Now we are given that  one observation 11 is excluded

So, new sum = 200-11=189

Since one observation is excluded so number of observations will be 7

So, new mean  = 189/7

                         =27

Hence the new mean is 27