A Company Introduces a New Product for Which the Number $S ( t ) = 300 \left( 7 - \frac { 10 } { 5 + t } \right)$

Multiple Choice

A company introduces a new product for which the number of units sold S is $S ( t ) = 300 \left( 7 - \frac { 10 } { 5 + t } \right)$ where $t$ is the time in months since the product was introduced. Find the average value of $S ( t )$ during the first year.

A) $\frac { 600 } { 17 }$
B) $\frac { 600 } { 11 }$
C) $\frac { 300 } { 17 }$
D) $\frac { 600 } { 17 }$ .
E) $\frac { 3000 } { 17 }$ .