find the mean of x+3+x+5+x+7+x+9+x+11
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Mean=sum of observations/no. Of observations
X+3+x+5+x+7+x+9+x+11/5
5x+35/5
X+7 is required mean
X+3+x+5+x+7+x+9+x+11/5
5x+35/5
X+7 is required mean
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