If the mean of five observations x,
x + 2, x + 4, X + 6, x + 8 is 10,
then find the mean of the first
three observations.
Answers
Step-by-step explanation:
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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