Question

If the mean of five observations , + , + , + + is 11, then the value of is *​

Answer 1

Answer:

Given observations x,x+2,x+4,x+6,x+8

∵

5

x+(x+2)+(x+4)+(x+6)+(x+8)

=11

⇒

5

5x+20

=11

⇒x=7

So, the observations are 7,9,11,13,15

Req. mean =

3

11+13+15

=13

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