question_answer

Find the mean of the data a, a + m, a + 2m, a + 3m, ____ up to (2n + 1) terms

A) \[a+nm+1\]      

B)  \[a+nm\]      

C)   \[a+2nm\]                  

D)  \[a+2mn-1\]

E)  None of these