question_answer

If the arithmetic mean of n numbers of a series is \[\overline{x}\] and sum of the first (n-1) numbers is k, then which one of the following is the nth number of the series?

A)  \[\overline{x}-nk\]                        

B)         \[n\overline{x}-k\]  

C)  \[k\overline{x}-n\]                        

D)         \[nk\overline{x}\]