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Algebra

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Sum of Every 5th Term of Series

ALGEBR-7G8YME

Find the sum of each term of the series:

$$\sum_{n=15}^{95}19+11(n-1)$$

...whose index is a multiple of 5.

A

$-7480$

B

$49653$

C

$10421$

D

$50920$

E

none of the above