We continue selecting every kth person to participate in the survey. ​ Therefore, the last person in the survey will be number 10 + 85 ( 40 - 1) = 3325....I have no idea how to do this math

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Sequence and Series

A sequence is defined as a collection of things. Series is defined to sum the things one by one in the sequence.  It was invented by German mathematician Carl Friedrich Gauss.