Question

if the mean of 5 observations x,x+2,x+4,x+6,x+8=11​

Answer 1

Answer:

x = 7

Step-by-step explanation:

mean = 11

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

(5x + 20)/5 = 11

5x + 20 = 11 × 5

5x + 20 = 55

5x = 55 - 20

5x = 35

x = 35/5

x = 7

Answer 2

Answer:

mean =sum of all observation/total no of observation

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

11*5=5x+20

55=5(x+4)

11=x+4

11-4=x

7=x