Question

The mean of 7, 9, and x is the same as the mean of 4, 8, 9 and 11.
Find the value of x.​

Answer 1

Answer:

idk sorry ;-;

Answer 2

Step-by-step explanation:

mean formula= A.M=∑x/N

Mean of 7, 9, and 'x' = 4, 8, 9and 11

• mean of 4, 8, 9 and 11 = ∑x= 32, N=4  

                                                = 32/4= 8

• mean of 7, 9 and 'x'= 8

                               = ∑x/N= 8

                               = (7+9)+x=8

                               = 16+x=8

    By  transposing = x= 8-16 = 8

      therefore 'x'= 8

• Verification=

mean of 7, 9, and 'x' = 4, 8, 9 and 11

A.M=∑x/N

7, 9, 8(x)= 24/3= 8