question_answer

The mean of the scores \[{{x}_{1}},{{x}_{2}},.......,{{x}_{n}}\] is x. What is the mean of the scores of \[7{{x}_{1}},7{{x}_{2}},.......,7{{x}_{6}}\]?

A)  \[x-42\]                        

B)  \[\frac{x}{7}\]            

C) \[~x\,\text{+}\,42\]                   

D)  \[7x\]