Question

If the mean of 5 observations x, x+2, X+4, X+6 and x+8 is 11, find the
value of x.
(CBSE 2014]​

Answer 1

Answer:

x=7

Step-by-step explanation:

(MEAN)=$\frac{x+(x+2)+(x+4)+(x+6)+(x+8)}{5}$, and on the other hand (MEAN)=11.

$5x+20=11*5$

$5x=35$

∴$x=7$

Answer 2

Step-by-step explanation:

Mean=sum of observations/number of observations

11=x+x+2+x+4+x+6+x+8/5

11=5x+20/5

11×5=5x+20

55=5x+20

55-20=5x

5x=35

x=35/5

x=7