Find the Partial Sum Of $\sum _ { k = 1 } ^ { 5 } \frac { n } { 10 }$

Find the partial sum of $\sum _ { k = 1 } ^ { 5 } \frac { n } { 10 }$ .

A) -13.75
B) 0.25
C) 2.5
D) 1.5
E) 3