If the mean of 7,9,11,X, and 15 is 12 find the value of x
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Mean=Sum of obs/no of obs.
12=7+9+11+X+15 /5
12=42+X/5
42+X=12*5
42+X=60
X=60-42
X=18
12=7+9+11+X+15 /5
12=42+X/5
42+X=12*5
42+X=60
X=60-42
X=18
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