Question

If the mean of 5 observations X,X+2,X+4,X+6,X+8 is 11, find the value of X

Answer 1

Answer:

5 x +20 /5 =11

5x = 55 _ 20 =35

x = 7

Answer 2

Answer:

mean=(x+x+2+x+4+x+6+x+8)/5

11=5x+20

11-20=5x

-9=5x

x=-9/5

x=-1.8