If the mean of 5 observations X,X+2,X+4,X+6,X+8 is 11 , find the value

1.	If the mean of 5 observations X,X+2,X+4,X+6,X+8 is 11 , find the value of X
Answer» (X+X+2+X+4+X+6+X+8)/5=11(5X+20)/5=115X+20=11×55X=55-205X=35X=35/5X=7

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