If \[{{\mathbf{x}}_{\mathbf{1}}},\text{ }{{\mathbf{x}}_{\mathbf{2}}},\text{ }\ldots \ldots \ldots ,\text{ }{{\mathbf{x}}_{\mathbf{n}}}\]are n values of variables X such that \[\sum\limits_{\mathbf{i=1}}^{\mathbf{k}}{\mathbf{(}{{\mathbf{x}}_{\mathbf{i}}}\mathbf{-3)}}\mathbf{=135}\] and \[\sum\limits_{\mathbf{i=1}}^{\mathbf{k}}{\mathbf{(}{{\mathbf{x}}_{\mathbf{i}}}\mathbf{-6)}}\mathbf{=60}\]Then the value of mean is ________

If \[{{\mathbf{x}}_{\mathbf{1}}},\text{ }{{\mathbf{x}}_{\mathbf{2}}},\

1.	If \[{{\mathbf{x}}_{\mathbf{1}}},\text{ }{{\mathbf{x}}_{\mathbf{2}}},\text{ }\ldots \ldots \ldots ,\text{ }{{\mathbf{x}}_{\mathbf{n}}}\]are n values of variables X such that \[\sum\limits_{\mathbf{i=1}}^{\mathbf{k}}{\mathbf{(}{{\mathbf{x}}_{\mathbf{i}}}\mathbf{-3)}}\mathbf{=135}\] and \[\sum\limits_{\mathbf{i=1}}^{\mathbf{k}}{\mathbf{(}{{\mathbf{x}}_{\mathbf{i}}}\mathbf{-6)}}\mathbf{=60}\]Then the value of mean is ________
A.	7.4
B.	9.2
C.	8.4
D.	8.6
Answer» D. 8.6

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