Question

if the mean of 5 observation is x,x+2,x+4,x+6 andx+8 is 11, find the value of x​

Answer 1

given

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

so

5x+20=11*5

5x=55-20

5x=35

x=35/5

x=7

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Answer 2

Answer:

answer is 7

Step-by-step explanation:

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

5x + 20 =  55 

5x = 35 ⇒ x = 7

what students should know:mean of 'n' observation is the average of the same observations.(sum of observations/no. of observations)